Flame tube for combustion chamber of a gas turbine engine
Abstract
Abstract A FLAME TUBE FOR A GAS TURBINE ENGINE COMBUSTION CHAMBER, A WALL OF THE FLAME TUBE BEING DOUBLE-SKINNED FOR AT LEAST THE GREATER PART OF ITS AXIAL LENGTH OVER AT LEAST A PORTION OF ITS CIRCUMGERENCE, THE DOUBLE-SKINNED PORTION OF THE WALL COMPRISING AN INTERNAL SKIN SPACED FROM AN EXTERNAL SKIN TO DEFINE AN AXIALLY ELONGATED PASSAGE, THE PASSAGE RECEIVING COOLING AIR AND BEING OPEN AT ITS DOWNWARD END TO THE INTERIOR OF THE FLAME TUBE TO DIRECT COOLING AIR EMERGING FROM THE PASSAGE ACROSS AN INTERNAL SURFACE OF THE FLAME TUBE WALL TO EFFECT FILM COOLING THEREOF, THE EXTENAL SKIN HAVING APERTURES ADAPTED TO DIRECT JETS OF COOLING AIR FORCEFULLY ONTO THE INTERNAL SKIN, SO THAT NO BOUNDARY LAYER IS FORMED IN THE COOLING AIR FLOWING THROUGH SAID PASSAGE.
Inventors
- 👤 Eric Archie Alexander
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |