US4595298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature detection system for use on film cooled turbine airfoils
Assignee: United States Department of the Air Force
•
Filing: 1985-05-01
•
Granted: 1986-06-17
•
Expires: 2005-05-01
Abstract
Abstract Improved temperature detection system for use on film cooled turbine airfoils having a showerhead assembly with a series of parallel slots defined in the leading edge of an airfoil, each slot having a multiplicity of film flow ports exiting therefrom. A plurality of sensor assemblies are affixed to the airfoil showerhead and are couplable via electrodes to electronic sensing equipment for establishing the gas flow temperature.
Inventors
- 👤 Robert Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:30
CPC Classifications
G; G01; G01K; G01K13/00; G01K13/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
116 words
Apparatus for measuring the temperature of an annular stream of combustion gases at the leading edge of a film cooled turbine airfoil, comprising: a film cooled airfoil having a leading edge, said film cooled airfoil having a showerhead assembly defined at said leading edge of said airfoil and including a plurality of parallel slots formed into said leading edge, each of said slots defining a multiplicity of recessed ports in a row, said ports couplable to a cooling air source, and at least one sensor plate assembly, said sensor plate assembly being mounted over a portion of said slots of said showerhead assembly and couplable to electronic temperature indicating equipment via signal conductor means attachable therebetween.
Claim 2
Dependent Claim
116 words
Apparatus for measuring the temperature of an annular stream of combustion gases at the leading edge of a film cooled turbine airfoil, comprising: a film cooled airfoil having a leading edge, said film cooled airfoil having a showerhead assembly defined at said leading edge of said airfoil and including a plurality of parallel slots formed into said leading edge, each of said slots defining a multiplicity of recessed ports in a row, said ports couplable to a cooling air source, and at least one sensor plate assembly, said sensor plate assembly being mounted over a portion of said slots of said showerhead assembly and couplable to electronic temperature indicating equipment via signal conductor means attachable therebetween.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1 wherein said sensor comprises a platinum-rhodium plate, having an AlO 3 insulative coating applied thereto and a detection film applied to said AlO 3 coating.
Claim 4
Dependent Claim
28 words
The apparatus of claim 2, wherein at least one plate receiving depression is formed in said leading edge, wherein said sensor plate assembly is mounted in said depression.
Claim 5
Dependent Claim
27 words
The apparatus of claim 3, wherein said depression is configured so that the top of sensor plate assembly affixed thereat is flush with the airfoil surface thereat.
References Cited (Backward Citations)
US3212336A
Cited
US3348414A
Cited
US3592061A
Cited
US3597974A
Cited
US4029472A
Cited
US4132114A
Cited
US4279153A
Cited
US4311433A
Cited
US4244222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |