US6077036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bowed nozzle vane with selective TBC
Assignee: General Electric Co
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Filing: 1998-08-20
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Granted: 2000-06-20
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Expires: 2018-08-20
Abstract
Abstract A turbine nozzle includes outer and inner bands between which extend a plurality of vanes for channeling combustion gases. Each of the vanes includes leading and trailing edges, and pressure and suction sides extending therebetween, and also a bow along the trailing edge to increase pressure in the gases adjacent the inner band. The vanes also include a thermal barrier coating (TBC) selectively disposed solely along the suction side between the leading and trailing edges.
Inventors
- 👤 Todd S. Heffron
- 👤 John P. Heyward
- 👤 John H. Starkweather
- 👤 Scott M. Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:46
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/288; F01D5/14; F01D5/141; F01D5/145; F01D5/18; F01D5/186; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
A turbine nozzle for channelling combustion gases to turbine rotor blades comprising: an outer band; an inner band; a plurality of vanes extending between said outer and inner bands; each of said vanes including leading and trailing edges, and pressure and suction sides extending therebetween, and also including a bow along said trailing edge to increase pressure in said gases adjacent said inner band; and each of said vanes also including a thermal barrier coating selectively disposed solely along said suction side between said leading and trailing edges.
Claim 2
Dependent Claim
88 words
A turbine nozzle for channelling combustion gases to turbine rotor blades comprising: an outer band; an inner band; a plurality of vanes extending between said outer and inner bands; each of said vanes including leading and trailing edges, and pressure and suction sides extending therebetween, and also including a bow along said trailing edge to increase pressure in said gases adjacent said inner band; and each of said vanes also including a thermal barrier coating selectively disposed solely along said suction side between said leading and trailing edges.
Claim 3
Dependent Claim
74 words
A nozzle according to claim 1 wherein: adjacent ones of said vanes are spaced apart circumferentially to define a throat of minimal flow area therebetween having a first boundary along said pressure side at said trailing edge of one of said vanes, and a second boundary along said suction side adjacent said leading edge of a second one of said vanes; and both said first and second throat boundaries are devoid of said coating.
Claim 4
Dependent Claim
61 words
A nozzle according to claim 2 wherein: said vanes are hollow and include impingement baffles therein for channelling cooling air in impingement inside said vanes for impingement cooling both said pressure and suction sides thereof; and said coating is sized in thickness along said suction side to reduce differential thermal movement between said pressure and suction sides adjacent said vane bow.
Claim 5
Dependent Claim
34 words
A nozzle according to claim 3 wherein said vane bow is radially convex between said outer and inner bands along said pressure side, and radially concave along said suction side having said coating thereon.
Claim 6
Dependent Claim
40 words
A nozzle according to claim 4 wherein: said vane bow has maximum curvature at said trailing edge, and decreases in curvature toward said leading edge; and said coating decreases in thickness from said trailing edge toward said second throat boundary.
Claim 7
Dependent Claim
20 words
A nozzle according to claim 5 wherein said vane bow is disposed nearer said inner band than said outer band.
Claim 8
Dependent Claim
28 words
A nozzle according to claim 5 wherein each of said vanes twists about said leading edge from said inner band to said outer band to define said bow.
Claim 9
Dependent Claim
20 words
A nozzle according to claim 5 wherein each of said vanes leans along said trailing edge to define said bow.
Claim 10
Dependent Claim
34 words
A nozzle according to claim 5 wherein each of said vanes twists about said leading edge from said inner band to said outer band, and leans along said trailing edge to define said bow.
Claim 11
Dependent Claim
22 words
A nozzle according to claim 9 wherein said bow is configured to increase momentum of said combustion gases adjacent said inner band.
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) | 2003-06-20 | 2003-12-20 | 2004-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-06-20 | 2007-12-20 | 2008-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-06-20 | 2011-12-20 | 2012-06-20 | $7700.00 | Window Closed / Lapsed |