US5187931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustor inner passage with forward bleed openings
Assignee: General Electric Co
•
Filing: 1989-10-16
•
Granted: 1993-02-23
•
Expires: 2009-10-16
Abstract
Abstract An apparatus for delivering high pressure cooling air to the turbine rotor blades of a turbo machine comprises a plurality of circumferentially spaced, forward bleed openings formed in the combustor inner casing or inner wall of the combustor inner passage of the turbo machine which are effective to reduce separation of the air flow directed through the combustor inner passage and thus reduce turbulence and pressure losses therein.
Inventors
- 👤 Jack R. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:14
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/16; F01; F01D; F01D5/00; F01D5/02; F01D5/08; F01D5/081
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
318 words
An apparatus for delivering high pressure cooling air to the rotor blades of a turbine in a turbo-machine, said turbo-machine having a compressor with an aft discharge end and a combustor located between the compressor and turbine, comprising: an annular inner wall and an annular outer wall spaced from said annular inner wall forming a combustor inner passage therebetween, said combustor inner passage having a forward end formed with an inlet communicating with the aft discharge end of the compressor for receiving a high pressure air stream therefrom, said air stream being initially in contact with said annular outer wall of said combustor inner passage but separated from said inner wall thereof immediately downstream from said inlet to said combustor inner passage; said annular inner wall of said combustor inner passage being formed with a number of circumferentially spaced, forward bleed openings at said forward end thereof downstream from said inlet of said combustor inner passage, said annular inner wall being formed with an annular aft-facing step which forms the forward portion of each of said circumferentially spaced, forward bleed openings, the transverse dimension of said combustor inner passage being less upstream from said aft-facing step than downstream thereof, said forward bleed openings being effective to withdraw at least a portion of said air stream from said combustor inner passage and to cause said air stream to extend from said annular outer wall into contact with said annular inner wall of said combustor inner passage at an attachment point on said annular inner wall located between said forward bleed openings and said inlet of said combustor inner passage so that turbulence and pressure losses within said combustor inner passage are reduced; and means communicating with said forward bleed openings in said annular inner wall of said combustor inner passage to direct said portion of said air stream flowing therethrough to the rotor blades of the turbine for cooling.
Claim 2
Independent Claim
318 words
An apparatus for delivering high pressure cooling air to the rotor blades of a turbine in a turbo-machine, said turbo-machine having a compressor with an aft discharge end and a combustor located between the compressor and turbine, comprising: an annular inner wall and an annular outer wall spaced from said annular inner wall forming a combustor inner passage therebetween, said combustor inner passage having a forward end formed with an inlet communicating with the aft discharge end of the compressor for receiving a high pressure air stream therefrom, said air stream being initially in contact with said annular outer wall of said combustor inner passage but separated from said inner wall thereof immediately downstream from said inlet to said combustor inner passage; said annular inner wall of said combustor inner passage being formed with a number of circumferentially spaced, forward bleed openings at said forward end thereof downstream from said inlet of said combustor inner passage, said annular inner wall being formed with an annular aft-facing step which forms the forward portion of each of said circumferentially spaced, forward bleed openings, the transverse dimension of said combustor inner passage being less upstream from said aft-facing step than downstream thereof, said forward bleed openings being effective to withdraw at least a portion of said air stream from said combustor inner passage and to cause said air stream to extend from said annular outer wall into contact with said annular inner wall of said combustor inner passage at an attachment point on said annular inner wall located between said forward bleed openings and said inlet of said combustor inner passage so that turbulence and pressure losses within said combustor inner passage are reduced; and means communicating with said forward bleed openings in said annular inner wall of said combustor inner passage to direct said portion of said air stream flowing therethrough to the rotor blades of the turbine for cooling.
Claim 3
Dependent Claim
30 words
The apparatus of claim 1 in which said annular aft-facing step is L-shaped including a substantially vertically extending wall and a substantially horizontally extending wall connected to said vertical wall.
References Cited (Backward Citations)
GB1152331A
Cited
GB1227052A
Cited
GB1217807A
Cited
US3742706A
Cited
US3777489A
Cited
US3910035A
Cited
US4098073A
Cited
GB2018362A
Cited
GB2046363A
Cited
US4296599A
Cited
US4272955A
Cited
GB2108202A
Cited
GB2103289A
Cited
US4807433A
Cited
GB2220034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-02-23 | 1996-08-24 | 1997-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-23 | 2000-08-24 | 2001-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-23 | 2004-08-24 | 2005-02-23 | $7700.00 | Window Closed / Lapsed |