1. An airfoil comprising a leading edge, a trailing edge, a suction side and a pressure side;
a plurality of internal cooling cavities extending radially within said airfoil, one of said plurality of internal cavities extending along said trailing edge, said trailing edge provided with a plurality of coolant exit apertures extending therealong; and
a plurality of vortex generators formed on an internal surface of at least one of said pressure and suction sides of said airfoil, said plurality of vortex generators arranged in radially spaced relationship in said one of said plurality of internal cooling cavities, extending substantially parallel to and in proximity to said plurality of coolant exit apertures extending along said trailing edge.
2. The airfoil of claim 1 wherein at least some of said plurality of vortex generators have a full delta-wing configuration.
3. The airfoil of claim 2 wherein at least some of said plurality of vortex generators have a half delta-wing configuration.
4. The airfoil of claim 1 wherein said plurality of vortex generators comprise first and second groups of vortex generators formed, respectively, on internal surfaces of both said pressure and suction sides of said airfoil, each of said first and second groups on vortex generators comprising single or multiple rows of vortex generators.
5. The airfoil of claim 1 wherein said plurality of vortex generators are arranged in single or multiple file on said internal surface.
6. The airfoil of claim 4 wherein said first group of vortex generators on said pressure side of said airfoil is substantially radially aligned with said second group of vortex generators on said suction side of said airfoil.
7. The airfoil of claim 4 wherein said first group of vortex generators on said pressure side of said airfoil is radially staggered relative to said second group of vortex generators on said suction side of said airfoil.
8. The airfoil of claim 2 wherein each full delta-wing configuration comprises an upwardly inclined entry ramp surface flanked by a pair of inwardly angled side surfaces that converge at a rearward apex.
9. The airfoil of claim 3 wherein each half delta-wing configuration comprises an upwardly inclined entry ramp surface flanked by an inwardly-inclined side surface and a vertical side surface that converge at a rearward apex.
10. The airfoil of claim 1 wherein said plurality of vortex generators comprises one or more triangular-shaped ribs.
11. The airfoil of claim 1 wherein each of said plurality of vortex generators comprises one or more wedge-shaped components.
12. A turbine engine airfoil comprising a leading edge, a trailing edge, a suction side and a pressure side; an internal cooling cavity within said airfoil extending radially along said trailing edge; a plurality of coolant exit apertures formed in said trailing edge; and a plurality of vortex generators formed on an internal surface of at least one of said suction side and said pressure side adjacent said plural coolant exit apertures within said internal cooling cavity, said plurality of vortex generators shaped to shed at least one cooling fluid vortex in a clockwise or counterclockwise direction.
13. The turbine engine airfoil of claim 12 wherein each of said plurality of vortex generators are shaped to shed a pair of cooling fluid vortices in counter-rotating directions.
14. The turbine engine airfoil of claim 12 wherein some of said plurality of vortex generators are shaped to shed a single cooling fluid vortex and some of said vortex generators are shaped to shed a pair of cooling fluid vortices.
15. The turbine engine airfoil of claim 12 wherein at least some of said plurality of vortex generators have a full delta-wing configuration.
16. The turbine engine airfoil of claim 12 wherein at least some of said plurality of vortex generators have a half delta-wing configuration.
17. The turbine engine airfoil of claim 12 wherein said plurality of vortex generators each comprise one or more triangular-shaped ribs.
18. The turbine engine airfoil of claim 12 wherein said plurality of vortex generators each comprise one or more wedge-shaped components.
19. The turbine engine airfoil of claim 12 wherein said plurality of vortex generators are formed in single or multiple file on said internal surface.
20. An airfoil comprising a leading edge, a trailing edge, a suction side and a pressure side; an internal cooling cavity within said airfoil said internal cooling cavity provided with plural exit apertures along said trailing edge; and a plurality of vortex generators formed on an internal surface of at least one of said suction side and said pressure side within said internal cooling cavity and located adjacent said plural exit apertures, said plurality of vortex generators arranged in at least one radially-extending row and shaped to shed at least one cooling fluid vortex in a clockwise or counterclockwise direction; said plurality of vortex generators each having a configuration chosen from a group consisting of full delta wing, half delta wing, rib winglet, rib winglet pair, and wedge-shaped.
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 apparatus for dispensing product from a roll, the apparatus comprising:
a drive roller adapted to advance product from a roll;
a field generator configured to generate an electromagnetic field proximate a portion of the roll;
a hub providing a housing for the field generator;
a closed loop conductor associated with the core of the product roll.
a controller associated with the field generator and adapted to determine if an alteration of the electromagnetic field by the closed loop conductor of the roll substantially matches an expected alteration of the electromagnetic field for an authorized roll, and if the altered electromagnetic field substantially matches the expected alteration, then permit the drive roller to advance the product from the roll.
2. The apparatus of claim 1 wherein the field generator includes a coil wrapped around a bobbin, and further comprising an oscillator, and wherein the controller drives the oscillator to provide a waveform that is emitted by the coil, the waveform having a characteristic frequency, and compares the waveform as modified by the closed loop conductor of the roll to determine if the roll is authorized for use with the apparatus.
3. The apparatus of claim 2 wherein the closed loop conductor is a plug having an inductive element that is inserted into an open end of the roll, and has a substantially annular body extending between the first end and the second, and wherein the inductive element is in the form of a metallic member contained within the body.
4. The apparatus of claim 3 wherein a position of the metallic member along the annular body defines an inductive signature for the plug.
5. The apparatus of claim 4 wherein the annular body has a set of spaced annular ridges formed along an interior surface of the body that define a set of possible positions for the metallic member.
6. The apparatus of claim 3 wherein the metallic member is a metallic ring.
7. The apparatus of claim 6 wherein the metallic ring is a washer.
8. The apparatus of claim 3 wherein the metallic member is encased within the plug.
9. The apparatus of claim 8 wherein the metallic member is insert molded with the plug.
10. The apparatus of claim 1 wherein the roll includes a roll core and web material wrapped around the roll core.
11. The apparatus of claim 3 wherein the mass of the metallic member and the position of the metallic member within the plug defines an inductive signature for the plug.
12. The apparatus of claim 1 wherein the closed loop conductor is coupled to the roll.
13. The apparatus of claim 1 wherein the alteration of the electromagnetic field provides information identifying at least one of roll brand, roll type, and roll size.
14. The apparatus of claim 1 wherein the controller is further configured to provide a user-discernible indication that the drive roller has been locked out.
15. A method of regulating product dispensing from a dispenser, the method comprising:
inserting a plug having a conductive component into an open end of a roll of product;
creating an electromagnetic field having a characteristic frequency proximate the plug when the roll is loaded into the dispenser;
detecting a change to the characteristic frequency, the change created by the presence of a closed loop associated with the plug;
comparing the changed frequency to a verification frequency; and
enabling motorized advancement of the product if the changed frequency substantially matches the verification frequency.
16. The method of claim 15 wherein creating the electromagnetic field includes driving an oscillator to feed a signal having the characteristic frequency to a coil proximate the plug.
17. The method of claim 16 further comprising controlling a drive motor to advance the product a predefined amount based on the changed frequency associated with the plug.
18. The method of claim 16 further comprising determining a roll brand from the changed frequency.
19. The method of claim 18 further comprising determining a roll type, or a roll size, from the changed frequency.
20. A plug for a roll of web material for use with an automatic dispensing device, the plug comprising:
a generally elongated annular body having a first end configured to be received in an open end of the roll of web material and a second end configured to be received in a hub of the automatic dispensing device; and
a metallic member disposed in the annular body, the metallic member having at least one of a mass and a position in the annular body defining an inductive signature for the plug.
21. The plug of claim 20 wherein the metallic member is molded with the body.
22. The plug of claim 20 wherein the metallic member is contained within a plastic insert that is configured to be snap-fit into place within the body.
23. The plug of claim 20 wherein the metallic member is contained within a plastic insert having a keyed circumferential edge, and wherein the body further comprises a set of keyways spaced from one another along an inner surface of the body defining the inner cavity, and wherein the keyways define a plurality of depths within the body the insert may be positioned.
24. The plug of claim 19 wherein the metallic member is a washer.