1. A method comprising:
wirelessly transmitting, by a first access point, data packets to one or more destination devices across a network on a first channel of a first frequency band at a first data rate of 11 Mbps or greater, the first frequency band having a plurality of channels, the wireless network including a plurality of access points disposed about a building, each access point having a first transmission range of maximum bandwidth and a second transmission range of signal interference, the access points being arranged in a topology wherein each access point is spaced-apart from a nearest neighboring access point by a first distance less than the first transmission range;
wirelessly repeating the data packets in the first frequency band substantially at the first data rate by a series of additional access points that extend across the topology, each of the additional access points having a transceiver that includes transmitter and receiver sections, the transceiver of a first additional access point:
receiving the data packets in the first frequency band during odd time intervals;
buffering the data packets; and
wirelessly re-transmitting the buffered data packets on the first channel in the first frequency band on one of the plurality of channels during even time intervals, the transceiver of a first additional access point not transmitting during the odd time intervals;
the transceiver of a second additional access point:
receiving the data packets in the first frequency band during even time intervals;
buffering the data packets; and
wirelessly re-transmitting the buffered data packets in the first frequency band on one of the plurality of channels during the odd time intervals, the transceiver of a second additional access point not transmitting during the even time intervals,
wherein any pair of the access points transmitting on a same channel is separated by a distance greater than the second transmission range.
2. The method of claim 1 wherein the first frequency band is a 5 GHz frequency band.
3. The method of claim 1 further comprising:
wirelessly transmitting, by each access point, the data packets in a second frequency band.
4. The method of claim 3 further comprising:
wirelessly receiving the data packets by a destination device in the second frequency band.
5. The method of claim 3 wherein the second frequency band is a 2.4 GHz frequency band.
6. The method of claim 1 further comprising:
self-configuring the network by one or more of the access points to allocate selected ones of channels to each of the access points, the channels being selected such that no pair of any of the access points located within the second transmission range of each other transmit on the same channel.
7. The method of claim 6 further comprising:
adapting the network to an interference source by re-self-configuring the network by the one or more of the access points such that no pair of any of the access points located within the second transmission range of each other transmit on the same channel and no access point within a transmission range of the interference source transmits on a channel that interferes with the interference source.
8. The method of claim 1 wherein the one or more destination devices comprise a television.
9. The method of claim 1 wherein the one or more destination devices comprise a computer.
10. A method comprising:
wirelessly receiving, by a first access point of a wireless network that includes a plurality of access points, video data packets transmitted from a source on a first channel of a first frequency band during odd time intervals;
wirelessly re-transmitting, by the first access point, the video data packets on a first channel of a second frequency band at a data rate that exceeds 30 Mbps, the second frequency band having a plurality of channels, the video data packets being transmitted during even time intervals over the wireless network, the first access point not transmitting during the odd time intervals, a second access point of the wireless network being configured to receive the video data packets from the first access point during the even time intervals and re-transmit the video data packets during the odd time intervals, the second access point not transmitting during the even time intervals,
each of the access points having a first transmission range of maximum bandwidth and a second transmission range of signal interference, the access points being arranged in a topology wherein each access point is spaced-apart from a nearest neighboring access point by a first distance less than the first transmission range, the access points functioning as wireless repeaters operating in compliance with an 802.11x standard, each of the access points transmitting the video data packets on one of the plurality of channels, wherein any pair of the access points transmitting on a same channel is separated by a second distance greater than the second transmission range.
11. The method of claim 10 further comprising:
receiving, by a destination device, the video data packets from a last one of the wireless repeaters in the topology.
12. The method of claim 10 wherein the additional access points transmit the data in the second frequency band.
13. The method of claim 10 wherein the second frequency band is a 5 GHz frequency band.
14. The method of claim 10 further comprising:
transmitting, by one of the additional access points, the video data in the first frequency band to a destination device located within the first transmission range of the one of the additional access points.
15. The method of claim 10 wherein the first frequency band is a 2.4 GHz frequency band and the second frequency band is a 5 GHz frequency band.
16. The method of claim 10 further comprising:
self-configuring the wireless network to allocate selected ones of channels to each of the first access point and each of the additional access points, the channels being selected such that no pair of any of the first andor additional access points located within the second transmission range of each other transmit on the same channel.
17. The method of claim 10 further comprising:
adapting the wireless network to an interference source by re-self-configuring the wireless network such that no pair of any of the first andor additional access points located within the second transmission range of each other transmit on the same channel and none of the first andor additional access points located within a transmission range of the interference source transmits on a channel that interferes with the interference source.
18. The method of claim 11 wherein the destination device comprises a television.
19. The method of claim 11 wherein the destination device comprises a computer.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An industrial gas turbine exhaust system, comprising:
an inner case;
an outer case circumscribing the inner case in spaced relationship relative to a centerline defined by the exhaust system;
a turbine exhaust path defined between the outer and inner cases; and
a plurality of struts interposed between the outer and inner cases that are tilted at an angle relative to a radius defined by the exhaust system centerline; and
a strut collar coupled to an end of at least one strut and its respective abutting outer or inner case, the collar outer surface having a constant fillet radius external profile on an acute angle side thereof for smooth exhaust flow transition between its respective strut and abutting case surface, the fillet radius profile having a range of about 15%-40% of strut maximum thickness.
2. The system of claim 1, the struts having symmetrical airfoil profiles, camber lines of which are aligned parallel with exhaust flow direction in the exhaust path.
3. The system of claim 2, the airfoil profile having a width to chord length ratio of up to approximately 40% and a trailing edge radius between approximately 10%-20% of the strut chord length.
4. The system of claim 3, further comprising respective strut collars coupled to respective ends of each strut and respective abutting outer or inner case.
5. The system of claim 1, further comprising respective strut collars coupled to respective ends of each strut and respective abutting outer or inner case.
6. The system of claim 5, each strut collar having generally uniform verticalradial cross section thickness at least on an obtuse angle side of the collar.
7. The system of claim 1, further comprising the inner and outer cases adapted for insertion within a turbine exhaust case (TEC), with the struts oriented downstream of the TEC.
8. The system of claim 7, the struts oriented in radially aligned rows in the TEC and downstream the TEC.
9. The system of claim 1, each strut collar having a generally uniform verticalradial cross section thickness at least on an obtuse angle side of the collar.
10. An industrial gas turbine apparatus, comprising:
a compressor section;
a combustor section;
a turbine section including a last downstream row of turbine blades that are mounted on a rotating shaft; and
an industrial gas turbine exhaust system, having:
a turbine exhaust case (TEC) coupled to a downstream end of the turbine section;
an inner case;
an outer case circumscribing the inner case in spaced relationship relative to a centerline defined by the exhaust system;
a turbine exhaust path defined between the outer and inner cases, extending downstream of the turbine blades;
a plurality of struts interposed between the outer and inner cases that are tilted at an angle relative to a radius defined by the exhaust system centerline; and
a strut collar coupled to an end of at least one strut and its respective abutting outer or inner case, the collar outer surface having a constant fillet radius external profile on an acute angle side thereof for smooth exhaust flow transition between its respective strut and abutting case surface, the fillet radius profile having a range of about 15%-40% of strut maximum thickness.
11. The apparatus of claim 10, further comprising respective strut collars coupled to respective ends of each strut and its respective abutting outer or inner case.
12. The apparatus of claim 10, the plurality of struts axially aligned about the exhaust system circumference downstream of the TEC.
13. The apparatus of claim 12, the struts downstream of the TEC having symmetrical airfoil profiles, camber lines of which are aligned parallel with exhaust flow direction in the exhaust path.
14. The apparatus of claim 13, the struts downstream of the TEC forming an airfoil profile having a width to chord length ratio of up to approximately 40% and a trailing edge radius between approximately 10%-20% of the strut chord length.
15. The apparatus of claim 10, each strut collar having generally uniform verticalradial cross section thickness at least on an obtuse angle side of the collar.
16. A method for fabricating an industrial gas turbine exhaust system, comprising:
simulating an operating gas turbine exhaust flow in a simulated gas turbine exhaust system exhaust path between interior facing surfaces of a simulated turbine exhaust inner case and outer case;
providing a plurality of sets of simulated gas turbine exhaust system struts that are tilted at an angle relative to a radius defined by the exhaust system centerline and mating strut collars having different surface profiles, each collar having an outer surface having a constant fillet radius external profile on an acute angle side thereof and each collar adapted for coupling to an end of its corresponding strut and a mating inner or outer case interior surface;
interposing a plurality of a first set of simulated struts and mating strut collars between the simulated outer and inner cases and monitoring first simulated exhaust flow characteristics;
interposing a plurality of a second set of simulated struts and mating strut collars between the simulated outer and inner cases and monitoring second simulated exhaust flow characteristics;
selecting the first or second set of simulated struts and mating strut collars for fabrication of a gas turbine exhaust system based at least in part on the first and second simulated exhaust flow characteristics; and
fabricating a gas turbine exhaust system in conformance with the simulated outer cases and the selected first or second set of simulated struts and mating strut collars.
17. The method of claim 16, respective struts of the plurality of simulated strut sets having symmetrical airfoil profiles, camber lines of which are aligned parallel with exhaust flow direction in the exhaust path.
18. The method of claim 17, airfoil profile of respective strut of each of the plurality of simulated strut sets having a width to chord length ratio range of up to approximately 40% and a trailing edge radius between approximately 10%-20% of the strut chord length.
19. The method of claim 18, respective strut collars of the plurality of simulated strut sets having generally uniform verticalradial cross section thickness at least on an obtuse angle side of the collar.
20. The method of claim 16, respective strut collars of the plurality of simulated strut sets having generally uniform verticalradial cross section thickness at least on an obtuse angle side of the collar.