US3623711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustor liner cooling arrangement
Assignee: Avco Corp
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Filing: 1970-07-13
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Granted: 1971-11-30
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Expires: 1990-07-13
Abstract
Abstract The liner of a combustion chamber is provided with perforations through which coolant air passes. The perforations are sized so that a transpiration cooling effect results and the shape of the perforations is such that a component of flow of coolant air is produced along the thermally exposed surface of the liner. Thus, air passing through the perforations provides the combination of transpiration cooling and film cooling.
Inventors
- 👤 Rolf A Thorstenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:44
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/002; F23R3/02; F23R3/04; F23R3/06; F05; F05B; F05B2260/00; F05B2260/20; F05B2260/202; F05B2260/203
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
A combustion chamber comprising a wall, the inner surface of said wall providing a passage for the flow of hot-burning gases, the outer surface of said wall being supplied with coolant air, said wall being provided with a plurality of closely spaced perforations, said perforations being sized and shaped to provide a porous-type structure whereby the effusion of coolant air through said perforations results in transpiration-type cooling, said perforations being disposed at an angle to said wall, said angle being inwardly disposed from the outer surface to the inner surface in a downstream direction to impart a velocity component to said coolant air along the inner surface of said wall in the direction of flow of said hot gases.
Claim 2
Dependent Claim
119 words
A combustion chamber comprising a wall, the inner surface of said wall providing a passage for the flow of hot-burning gases, the outer surface of said wall being supplied with coolant air, said wall being provided with a plurality of closely spaced perforations, said perforations being sized and shaped to provide a porous-type structure whereby the effusion of coolant air through said perforations results in transpiration-type cooling, said perforations being disposed at an angle to said wall, said angle being inwardly disposed from the outer surface to the inner surface in a downstream direction to impart a velocity component to said coolant air along the inner surface of said wall in the direction of flow of said hot gases.
Claim 3
Dependent Claim
23 words
The invention as defined in claim 1 wherein said angle is inwardly disposed at approximately 45* with respect to said direction of flow.
Claim 4
Dependent Claim
41 words
The invention as defined in claim 1 wherein said perforations are punched holes, said holes being punched from said outer surface of said wall toward said inner surface in a direction having a component parallel to the direction of said flow.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |