1. A method for reflowing a page, comprising:
receiving, in a processor, a page represented in a page description language, the page including a plurality of page objects that include at least one item of text and at least one graphical element; and
changing a size of the page to a changed size in a first dimension without changing the size of the page objects, while maintaining spatial relationships between the page objects in a second dimension, wherein changing the size includes creating one or more new pages having the changed size as in the first dimension, and, adding textual and graphical elements to the one or more new pages, wherein adding includes identifying distances in the second dimension between one or more textual elements and one or more graphical elements, and adding the textual elements to the one or more new pages and the graphical elements to the one or more new pages based on the distances in the second dimension and positions of the scaled textual elements in the one or more new pages, wherein identifying distances includes creating a map containing the positions of the textual elements in the page, and augmenting the map with the positions of the textual elements in the one or more new pages to produce a relationship for each textual element between the position of the textual element in the page and the position of the textual element in the one or more new pages, wherein the graphical elements are added to the one or more new pages according to the map.
2. The method of claim 1, wherein the step of adding the graphical elements according to the map comprises:
associating one or more particular textual elements with one or more particular graphical elements;
determining distances in the second dimension between the particular textual elements and the particular graphical elements; and
selecting positions in the one or more new pages for placement of the particular graphical elements based on the distances and the positions of the particular textual elements in the one or more new pages as listed in the map.
3. The method of claim 2, wherein the associating step comprises:
associating a particular graphical element with a particular textual element that is nearest to the particular graphical element in the first dimension.
4. The method of claim 2, wherein
the associating step includes associating a given graphical element with a plurality of given textual elements; and
the selecting step includes scaling the given graphical element when a distance in the first dimension between the plurality of given textual elements in the page differs from a corresponding distance between the plurality of given textual elements in the one or more new pages.
5. The method of claim 1, wherein the textual elements are organized as words.
6. A method for reflowing a page, comprising:
receiving, in a processor, a page represented in a page description language, the page including a plurality of page objects that include at least one item of text and at least one graphical element; and
changing a size of the page objects without changing the size of the page, while maintaining spatial relationships between the page objects in a dimension of the page, wherein changing the size includes creating one or more new pages having the same size as the page in the further dimension, and, adding scaled versions of textual and graphical elements to the one or more new pages, wherein adding includes identifying distances in the dimension between one or more textual elements and one or more graphical elements, and adding the scaled textual elements to the one or more new pages and the scaled graphical elements to the one or more new pages based on the distances in the dimension and the positions of the scaled textual elements in the one or more new pages, wherein identifying distances includes creating a map containing the positions of the textual elements in the page, and augmenting the map with the positions of the textual elements in the one or more new pages to produce a relationship for each textual element between the position of the textual element in the page and the position of the corresponding scaled textual element in the one or more new pages, wherein the scaled graphical elements are added to the one or more new pages according to the map.
7. The method of claim 6, wherein the step of adding the scaled graphical elements according to the map comprises:
associating one or more particular textual elements with one or more particular graphical elements;
determining distances in the dimension between the particular textual elements and the particular graphical elements; and
selecting positions in the one or more new pages for placement of the scaled graphical elements corresponding to the particular graphical elements based on the distances and the positions of scaled textual elements corresponding to the particular textual elements in the one or more new pages as listed in the map.
8. The method of claim 7, wherein the associating step comprises:
associating a particular graphical element with a particular textual element that is nearest to the particular graphical element in the further dimension.
9. The method of claim 7, wherein
the associating step includes associating a given graphical element with a plurality of given textual elements; and
the selecting step includes scaling the given graphical element in the dimension when a distance in the dimension between the plurality of given textual elements in the page differs from a corresponding distance in the one or more new pages between a plurality of scaled textual elements corresponding to the plurality of given textual elements.
10. The method of claim 6, wherein the textual elements are organized as words.
11. A method for reflowing a page, comprising:
receiving, in a processor, a page represented in a page description language, the page including a plurality of page objects that include at least one item of text and at least one graphical element; and
changing a size of the page to a changed size in a first dimension, and changing a size of one or more of the page objects, while maintaining spatial relationships between the page objects in a second dimension, wherein changing the size of the page includes creating one or more new pages having the same size as the page in the second dimension, and, adding scaled versions of textual and graphical elements to the one or more new pages, wherein adding includes identifying distances in the second dimension between one or more textual elements and one or more graphical elements, and adding the scaled textual elements to the one or more new pages and the scaled graphical elements to the one or more new pages based on the distances in the second dimension and positions of the scaled textual elements in the one or more new pages, wherein identifying distances includes creating a map containing the positions of the textual elements in the page, and augmenting the map with the positions of the textual elements in the one or more new pages to produce a relationship for each textual element between the position of the textual element in the page and the position of the corresponding scaled textual element in the one or more new pages, wherein the scaled graphical elements are added to the one or more new pages according to the map.
12. The method of claim 11, wherein the step of adding the graphical elements according to the map comprises:
associating one or more particular textual elements with one or more particular graphical elements;
determining distances in the second dimension between the particular textual elements and the particular graphical elements; and
selecting positions in the one or more new pages for placement of the scaled graphical elements corresponding to the particular graphical elements based on the distances and the positions of scaled textual elements corresponding to the particular textual elements in the one or more new pages as listed in the map.
13. The method of claim 12, wherein the associating step comprises:
associating a particular graphical element with a particular textual element that is nearest to the particular graphical element in the first dimension.
14. The method of claim 12, wherein
the associating step includes associating a given graphical element with a plurality of given textual elements; and
the selecting step includes scaling the given graphical element when a distance in the dimension between the plurality of given textual elements in the page differs from a corresponding distance in the one or more new pages between a plurality of scaled textual elements corresponding to the plurality of given textual elements.
15. The method of claim 11, wherein the textual elements are organized as words.
16. The method of claim 11, wherein the amount of size change of a page object depends on the type of the page object.
17. A computer program product, tangibly stored on a computer-readable storage device, for reflowing a page, comprising instructions operable to cause a programmable processor to:
receive a page represented in a page description language, the page including a plurality of page objects that include at least one item of text and at least one graphical element; and
change a size of the page to a changed size in a first dimension without changing the size of the page objects, while maintaining spatial relationships between the page objects in a second dimension, wherein changing the size includes creating one or more new pages having the changed size in the first dimension, and, adding the textual and graphical elements to the one or more new pages, wherein adding includes identifying distances in the second dimension between one or more textual elements and one or more graphical elements, and adding the textual elements to the one or more new pages and the graphical elements to the one or more new pages based on the distances in the second dimension and positions of the textual elements in the one or more new pages, wherein identifying distances includes creating a map containing the positions of the textual elements in the page, and augmenting the map with the positions of the textual elements in the one or more new pages to produce a relationship for each textual element between the position of the textual element in the page and the position of the textual element in the one or more new pages, wherein the graphical elements are added to the one or more new pages according to the map.
18. The computer program product of claim 17, wherein the instructions operable to cause a programmable processor to add the graphical elements according to the map include instructions operable to cause a programmable processor to:
associate one or more particular textual elements with one or more particular graphical elements;
determine distances in the second dimension between the particular textual elements and the particular graphical elements; and
select positions in the one or more new pages for placement of the particular graphical elements based on the distances and the positions of the particular textual elements in the one or more new pages as listed in the map.
19. The computer program product of claim 18, wherein the instructions operable to cause a programmable processor to associate include instructions operable to cause a programmable processor to:
associate a particular graphical element with a particular textual element that is nearest to the particular graphical element in the first dimension.
20. The computer program product of claim 18, wherein
the instructions operable to cause a programmable processor to associate include instructions operable to cause a programmable processor to
associate a given graphical element with a plurality of given textual elements; and the instructions operable to cause a programmable processor to associate include instructions operable to cause a programmable processor to
scale the given graphical element when a distance in the first dimension between the plurality of given textual elements in the page differs from a corresponding distance between the plurality of given textual elements in the one or more new pages.
21. The computer program product of claim 17, wherein the textual elements are organized as words.
22. A computer program product, tangibly stored on a computer-readable storage device, for reflowing a page, comprising instructions operable to cause a programmable processor to:
receive a page represented in a page description language, the page including a plurality of page objects that include at least one item of text and at least one graphical element; and
change a size of the page objects without changing the size of the page, while maintaining spatial relationships between the page objects in a dimension of the page, wherein changing the size includes creating one or more new pages having the same size as the page in a further dimension, and, adding scaled versions of textual and graphical elements to the one or more new pages, wherein adding includes identifying distances in the dimension between one or more textual elements and one or more graphical elements, and adding the scaled textual elements to the one or more new pages and the scaled graphical elements to the one or more new pages based on the distances in the dimension and the positions of the scaled textual elements in the one or more new pages, wherein identifying distances includes creating a map containing the positions of the textual elements in the page, and augmenting the map with the positions of the textual elements in the one or more new pages to produce a relationship for each textual element between the position of the textual element in the page and the position of the corresponding scaled textual element in the one or more new pages, wherein the scaled graphical elements are added to the one or more new pages according to the map.
23. The computer program product of claim 22, wherein the instructions operable to cause a programmable processor to add include instructions operable to cause a programmable processor to:
associate one or more particular textual elements with one or more particular graphical elements;
determine distances in the dimension between the particular textual elements and the particular graphical elements; and
select positions in the one or more new pages for placement of the scaled graphical elements corresponding to the particular graphical elements based on the distances and the positions of scaled textual elements corresponding to the particular textual elements in the one or more new pages as listed in the map.
24. The computer program product of claim 23, wherein the instructions operable to cause a programmable processor to associate include instructions operable to cause a programmable processor to:
associate a particular graphical element with a particular textual element that is nearest to the particular graphical element in, the further dimension.
25. The computer program product of claim 23, wherein
the instructions operable to cause a programmable processor to associate include instructions operable to cause a programmable processor to associate a given graphical element with a plurality of given textual elements; and
the instructions operable to cause a programmable processor to select include instructions operable to cause a programmable processor to scale the given graphical element in the dimension when a distance in the dimension between the plurality of given textual elements in the page differs from a corresponding distance in the one or more new pages between a plurality of scaled textual elements corresponding to the plurality of given textual elements.
26. The computer program product of claim 22, wherein the textual elements are organized as words.
27. A computer program product, tangibly stored on a computer-readable storage device, for reflowing a page, comprising instructions operable to cause a programmable processor to:
receive a page represented in a page description language, the page including a plurality of page objects that include at least one item of text and at least one graphical element; and
change a size of the page to a changed size in a first dimension, and changing a size of one or more of the page objects, while maintaining spatial relationships between the page objects in a second dimension, wherein changing the size of the page includes creating one or more new pages having the same size as the page in a further dimension, and, adding scaled versions of textual and graphical elements to the one or more new pages, wherein adding includes identifying distances in the second dimension between one or more textual elements and one or more graphical elements, and adding the scaled textual elements to the one or more new pages and the scaled graphical elements to the one or more new pages based on the distances in the second dimension and positions of the scaled textual elements in the one or more new pages, wherein identifying distances includes creating a map containing the positions of the textual elements in the page, and augmenting the map with the positions of the textual elements in the one or more new pages to produce a relationship for each textual element between the position of the textual element in the page and the position of the corresponding scaled textual element in the one or more new pages, wherein the scaled graphical elements are added to the one or more new pages according to the map.
28. The computer program product of claim 27, wherein the instructions operable to cause a programmable processor to add the graphical elements according to the map include instructions operable to cause a programmable processor to:
associate one or more particular textual elements with one or more particular graphical elements;
determine distances in the second dimension between the particular textual elements and the particular graphical elements; and
select positions in the one or more new pages for placement of the scaled graphical elements corresponding to the particular graphical elements based on the distances and the positions of scaled textual elements corresponding to the particular textual elements in the one or more new pages as listed in the map.
29. The computer program product of claim 28, wherein the instructions operable to cause a programmable processor to associate include instructions operable to cause a programmable processor to:
associate a particular graphical element with a particular textual element that is nearest to the particular graphical element in the first dimension.
30. The computer program product of claim 28, wherein the instructions operable to cause a programmable processor to associate include instructions operable to cause a programmable processor to associate a given graphical element with a plurality of given textual elements; and
the instructions operable to cause a programmable processor to select include instructions operable to cause a programmable processor to scale the given graphical element when a distance in the dimension between the plurality of given textual elements in the page differs from a corresponding distance in the one or more new pages between a plurality of scaled textual elements corresponding to the plurality of given textual elements.
31. The computer program product of claim 27, wherein the textual elements are organized as words.
32. The computer program product of claim 27, wherein the amount of size change of a page object depends on the type of the page object.
33. A system, comprising:
a computer system comprising:
a memory for storing instructions; and
a processor for executing the stored instructions to:
receive a page represented in a page description language, the page including a plurality of page objects that include at least one item of text and at least one graphical element; and
change a size of the page to a changed size in a first dimension without changing the size of the page objects, while maintaining spatial relationships between the page objects in a second dimension, wherein changing the size includes creating one or more new pages having the changed size in the first dimension, and, adding textual and graphical elements to the one or more new pages, wherein adding includes identifying distances in the second dimension between one or more textual elements and one or more graphical elements, and adding the textual elements to the one or more new pages and the graphical elements to the one or more new pages based on the distances in the second dimension and positions of the textual elements in the one or more new pages, wherein identifying distances includes creating a map containing the positions of the textual elements in the page, and augmenting the map with the positions of the textual elements in the one or more new pages to produce a relationship for each textual element between the position of the textual element in the page and the position of the textual element in the one or more new pages, wherein the graphical elements are added to the one or more new pages according to the map.
34. The system of claim 33, wherein the processor is further configured to:
associate one or more particular textual elements with one or more particular graphical elements;
determine distances in the second dimension between the particular textual elements and the particular graphical elements; and
select positions in the one or more new pages for placement of the particular graphical elements based on the distances and the positions of the particular textual elements in the one or more new pages as listed in the map.
35. The system of claim 34, wherein the processor is further configured to:
associate a particular graphical element with a particular textual element that is nearest to the particular graphical element in the first dimension.
36. The system of claim 35, wherein the processor is further configured to
associate a given graphical element with a plurality of given textual elements; and
wherein to associate, the processor is configured to
scale the given graphical element when a distance in the first dimension between the plurality of given textual elements in the page differs from a corresponding distance between the plurality of given textual elements in the one or more new pages.
37. The system of claim 33, wherein the textual elements are organized as words.
38. A system comprising:
a computer system comprising:
a memory for storing instructions; and
a processor for executing the stored instructions to:
receive a page represented in a page description language, the page including a plurality of page objects that include at least one item of text and at least one graphical element; and
change a size of the page objects without changing the size of the page, while maintaining spatial relationships between the page objects in a dimension of the page, wherein changing the size includes creating one or more new pages having the same size as the page in a further dimension, and, adding scaled versions of textual and graphical elements to the one or more new pages, wherein adding includes identifying distances in the dimension between one or more textual elements and one or more graphical elements, and adding the scaled textual elements to the one or more new pages and the scaled graphical elements to the one or more new pages based on the distances in the dimension and positions of the scaled textual elements in the one or more new pages, wherein identifying distances includes creating a map containing the positions of the textual elements in the page, and augmenting the map with the positions of the textual elements in the one or more new pages to produce a relationship for each textual element between the position of the textual element in the page and the position of the corresponding scaled textual element in the one or more new pages, wherein the scaled graphical elements are added to the one or more new pages according to the map.
39. The system of claim 38, wherein the processor is further configured to:
associate one or more particular textual elements with one or more particular graphical elements;
determine distances in the dimension between the particular textual elements and the particular graphical elements; and
select positions in the one or more new pages for placement of the scaled graphical elements corresponding to the particular graphical elements based on the distances and the positions of scaled textual elements corresponding to the particular textual elements in the one or more new pages as listed in the map.
40. The system of claim 39, wherein the processor is further configured to:
associate a particular graphical element with a particular textual element that is nearest to the particular graphical element in, the further dimension.
41. The system of claim 39, wherein
the processor is configured to associate a given graphical element with a plurality of given textual elements; and
the processor is configured to scale the given graphical element in the dimension when a distance in the dimension between the plurality of given textual elements in the page differs from a corresponding distance in the one or more new pages between a plurality of scaled textual elements corresponding to the plurality of given textual elements.
42. The system of claim 38, wherein the textual elements are organized as words.
43. A system comprising:
a computer system comprising:
a memory for storing instructions; and
a processor for executing the stored instructions to:
receive a page represented in a page description language, the page including a plurality of page objects that include at least one item of text and at least one graphical element; and
change a size of the page to a changed size in a first dimension, and change a size of one or more of the page objects, while maintaining spatial relationships between the page objects in a second dimension, wherein changing the size of the page includes creating one or more new pages having the same size as the page in the second dimension, and, adding scaled versions of textual and graphical elements to the one or more new pages, wherein adding includes identifying distances in the second dimension between one or more textual elements and one or more graphical elements, and adding the scaled textual elements to the one or more new pages and the scaled graphical elements to the one or more new pages based on the distances in the second dimension and positions of the scaled textual elements in the one or more new pages, wherein identifying distances includes creating a map containing the positions of the textual elements in the page, and augmenting the map with the positions of the textual elements in the one or more new pages to produce a relationship for each textual element between the position of the textual element in the page and the position of the corresponding scaled textual element in the one or more new pages, wherein the scaled graphical elements are added to the one or more new pages according to the map.
44. The system of claim 43, wherein the processor is further configured to:
associate one or more particular textual elements with one or more particular graphical elements;
determine distances in the second dimension between the particular textual elements and the particular graphical elements; and
select positions in the one or more new pages for placement of the scaled graphical elements corresponding to the particular graphical elements based on the distances and positions of scaled textual elements corresponding to the particular textual elements in the one or more new pages as listed in the map.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What we claim is:
1. An improved premix secondary fuel nozzle for use in a gas turbine combustor comprising:
an elongated tube having a first and second opposing ends having a centerline defined therethrough and a tip region proximate said second end;
at least one first injector extending radially away from and fixed to said elongated tube and containing at least one first injector hole for injecting a fuel into said combustor such that air surrounding said fuel nozzle mixes with said fuel to form a premixture;
a central core coaxial with said centerline and located radially within said elongated tube thereby forming a first passage between said central core and said elongated tube, said central core extending from proximate said first opposing end to proximate said second opposing end, said central core containing a second passage extending from proximate said first opposing end to proximate said first injector for supplying fuel to said first injector, said central core also containing a third passage extending from downstream of said first injector to proximate said second opposing end, each of said second and third passages coaxial with said centerline, and said central core further containing a plurality of air flow channels in fluid communication with said third passage, said air flow channels having an air flow inlet region and air flow exit region, and said first passage extending from proximate said first opposing end to upstream of said air flow inlet region of said air flow channels;
a swirler fixed within said third passage for imparting a swirl to said air to cool said tip region of said fuel nozzle;
a second injector containing a plurality of second injector holes located proximate said second opposing end of said elongated tube for injecting a fluid medium into said combustor;
means for transferring said fluid medium from said first passage to said second injector;
wherein all fuel is injected radially outward of and upstream of said swirler so as to not directly initiate a pilot flame.
2. The improved premix secondary fuel nozzle of claim 1 wherein said first injector comprises an annular manifold circumferentially disposed about said elongated tube and affixed to a plurality of support members, said support members affixed to said elongated tube such that said annular manifold is in fluid communication with said second passage, said annular manifold having a plurality of first injector holes situated about its periphery and oriented to inject said fuel in a downstream direction, at least one of said first injector holes being circumferentially offset from said support members.
3. The improved premix secondary fuel nozzle of claim 2 wherein at least one of said first injector holes of said annular manifold is angled relative to the downstream direction.
4. The improved premix secondary fuel nozzle of claim 1 wherein said means for transferring said medium includes a plurality of transfer tubes having opposing ends, said transfer tubes surrounding said third passage and extending from upstream of said first injector to an annular plenum proximate said second injector.
5. The improved premix secondary fuel nozzle of claim 4 wherein said fluid medium can be either fuel or air, depending on combustor mode of operation.
6. The improved premix secondary fuel nozzle of claim 4 wherein seven of said transfer tubes surrounds seven of said airflow channels.
7. The improved premix secondary fuel nozzle of claim 1 wherein said first injector comprises a plurality of radially extending tubes, each of said tubes having at least one first hole, said hole injecting said fuel in the downstream direction, said plurality of radially extending tubes are in fluid communication with said second passage.
8. The improved premix secondary fuel nozzle of claim 7 wherein at least one of said first injector holes is angled in the circumferential direction.
9. The improved premix secondary fuel nozzle of claim 1 wherein said means for transferring said fluid medium comprises a generally annular passageway extending from upstream of said first injector to said second injector.
10. An improved dual stage, dual mode gas turbine combustor comprising:
a primary combustion chamber;
at least one primary fuel nozzle to deliver fuel to said primary combustion chamber;
a secondary combustion chamber adjacent to and downstream of said primary combustion chamber wherein said primary and secondary combustion chambers are separated by a venturi; and
a secondary fuel nozzle positioned to inject fuel towards said secondary combustion chamber and surrounded by a plurality of said primary fuel nozzles wherein said secondary fuel nozzle comprises:
an elongated tube having a first and second opposing ends having a centerline defined therethrough and a tip region proximate said second end;
at least one first injector extending radially away from and fixed to said elongated tube and containing at least one first injector hole for injecting a fuel into said combustor such that air surrounding said fuel nozzle mixes with said fuel to form a premixture;
a central core coaxial with said centerline and located radially within said elongated tube thereby forming a first passage between said central core and said elongated tube, said central core extending from proximate said first opposing end to proximate said second opposing end, said central core containing a second passage extending from proximate said first opposing end to proximate said first injector for supplying fuel to said first injector, said central core also containing a third passage extending from downstream of said first injector to proximate said second opposing end, each of said second and third passages coaxial with said centerline, and said central core further containing a plurality of air flow channels in fluid communication with said third passage, said air flow channels having an air flow inlet region and air flow exit region, and said first passage extending from proximate said first opposing end to upstream of said air flow inlet region of said air flow channels;
a swirler fixed within said third passage for imparting a swirl to said air to cool said tip region of said fuel nozzle;
a second injector containing a plurality of second injector holes located proximate said second opposing end of said elongated tube for injecting a fluid medium into said combustor;
means for transferring said fluid medium from said first passage to said second injector;
wherein all fuel is injected radially outward of and upstream of said swirler so as to not directly initiate a pilot flame.
11. The improved gas turbine combustor of claim 10 wherein said first injector comprises an annular manifold circumferentially disposed about said elongated tube and affixed to a plurality of support members, said support members affixed to said elongated tube such that said annular manifold is in fluid communication with said second passage, said annular manifold having a plurality of first injector holes situated about its periphery and oriented to inject said fuel in a downstream direction, at least one of said first injector holes being circumferentially offset from said support members.
12. The improved gas turbine combustor of claim 11 wherein at least one of said first injector holes of said annular manifold is angled relative to the downstream direction.
13. The improved gas turbine combustor of claim 10 wherein said means for transferring said medium includes a plurality of transfer tubes having opposing ends, said transfer tubes surrounding said third passage and extending from upstream of said first injector to an annular plenum proximate said second injector.
14. The improved gas turbine combustor of claim 13 wherein said fluid medium can be either fuel or air, depending on combustor mode of operation.
15. The improved gas turbine combustor of claim 13 wherein seven of said transfer tubes surrounds seven of said airflow channels.
16. The improved gas turbine combustor of claim 10 wherein said first injector comprises a plurality of radially extending tubes, each of said tubes having at least one first hole, said hole injecting said fuel in the downstream direction, said plurality of radially extending tubes are in fluid communication with said second passage.
17. The improved premix secondary fuel nozzle of claim 16 wherein at least one of said first injector holes is angled in the circumferential direction.
18. The improved premix secondary fuel nozzle of claim 10 wherein said means for transferring said fluid medium comprises a generally annular passageway extending from upstream of said first injector to said second injector.
19. An improved premix secondary fuel nozzle for use in a gas turbine combustor comprising:
an elongated tube having a first and second opposing ends having a centerline defined therethrough and a tip region proximate said second end;
at least one first injector extending radially away from and fixed to said elongated tube and containing at least one first injector hole for injecting a fuel into said combustor such that air surrounding said fuel nozzle mixes with said fuel to form a premixture;
a central core coaxial with said centerline and located radially within said elongated tube thereby forming a first passage between said central core and said elongated tube, said central core extending from proximate said first opposing end to proximate said second opposing end, said central core containing a second passage extending from proximate said first opposing end to proximate said first injector for supplying fuel to said first injector, said central core also containing a third passage extending from downstream of said first injector to proximate said second opposing end, each of said second and third passages coaxial with said centerline, and said central core further containing a plurality of air flow channels in fluid communication with said third passage, said air flow channels having an
air flow inlet region and air flow exit region, and said first passage extending from proximate said first opposing end to upstream of said air flow inlet region of said air flow channels;
a tip plate fixed to said central core proximate said tip region, said tip plate having a first surface, a second surface, a plate thickness therebetween, and a plurality of cooling holes extending from said first surface to said second surface such that said cooling holes have a hole length L;
a second injector containing a plurality of second injector holes located proximate said second opposing end of said elongated tube for injecting a fluid medium into said combustor;
means for transferring said fluid medium from said first passage to said second injector;
wherein all fuel is injected radially outward of and upstream of said tip plate so as to not directly initiate a pilot flame.
20. The improved premix secondary fuel nozzle of claim 19 wherein said first injector comprises an annular manifold circumferentially disposed about said elongated tube and affixed to a plurality of support members, said support members affixed to said elongated tube such that said annular manifold is in fluid communication with said second passage, said annular manifold having a plurality of first injector holes situated about its periphery and oriented to inject said fuel in a downstream direction, at least one of said first injector holes being circumferentially offset from said support members.
21. The improved premix secondary fuel nozzle of claim 20 wherein at least one of said first injector holes of said annular manifold is angled relative to the downstream direction.
22. The improved premix secondary fuel nozzle of claim 19 wherein said means for transferring said medium includes a plurality of transfer tubes having opposing ends, said transfer tubes surrounding said third passage and extending from upstream of said first injector to an annular plenum proximate said second injector.
23. The improved premix secondary fuel nozzle of claim 22 wherein said fluid medium can be either fuel or air, depending on combustor mode of operation.
24. The improved premix secondary fuel nozzle of claim 22 wherein seven of said transfer tubes surrounds seven of said airflow channels.
25. The improved premix secondary fuel nozzle of claim 19 wherein said first injector comprises a plurality of radially extending tubes, each of said tubes having at least one first hole, said hole injecting said fuel in the downstream direction, said plurality of radially extending tubes are in fluid communication with said second passage.
26. The improved premix secondary fuel nozzle of claim 25 wherein at least one of said first injector holes is angled in the circumferential direction.
27. The improved premix secondary fuel nozzle of claim 19 wherein said means for transferring said fluid medium comprises a generally annular passageway extending from upstream of said first injector to said second injector.
28. The improved premix secondary fuel nozzle of claim 19 wherein said plate thickness is at least 0.125 inches.
29. The improved premix secondary fuel nozzle of claim 28 wherein said cooling holes of said tip plate are generally perpendicular to said second surface such that said hole length L equals said plate thickness.
30. The improved premix secondary fuel nozzle of claim 29 wherein said cooling holes have a diameter D ranging from 0.020 inches to 0.070 inches.
31. The improved premix secondary fuel nozzle of claim 19 wherein said cooling holes of said tip plate are oriented at an angle with respect to said second surface.
32. The improved premix secondary fuel nozzle of claim 31 wherein said angle ranges from 25 degrees to 45 degrees.
33. The improved premix secondary fuel nozzle of claim 32 wherein said cooling holes have a diameter D ranging from 0.020 inches to 0.070 inches.
34. The improved premix secondary fuel nozzle of claim 33 wherein said hole length L of said cooling holes is greater than said plate thickness.