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US3826082A Expired / Lapsed US ⏱️ 0.0 years remaining

Combustion liner cooling slot stabilizing dimple

Assignee: General Electric Co
•
Filing: 1973-03-30
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Granted: 1974-07-30
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Expires: 1993-03-30
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Abstract

Abstract A combustor liner film cooling slot, of the variety including an annular space extending circumferentially of the liner which space is defined between overlapping portions of telescoping liner segments, a cooling fluid plenum substantially circumscribing the liner, means for transferring cooling fluid from the plenum to the space, means for exhausting fluid from the space onto the liner, and an overhanging lip extending substantially axially downstream of the space for facilitating attachment of the fluid to the liner in a protective film barrier, is provided with a plurality of circumferentially spaced stabilizing dimples disposed within the overhanging lip. Each dimple includes a radially depressed portion which has a larger circumferential width at its upstream extremity than its downstream extremity. The depression is disposed toward the associated cooler liner segment and is provided with a geometry which enhances stress relief of the lip as well as cooling fluid attachment as a protective film barrier upon the heated side of the liner downstream from the lip.

Inventors

  • 👤 R Smuland
  • 👤 R Ward

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 21:32
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/04; F23R3/06; F23R3/08

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 129 words
In a combustor liner film cooling slot of the variety including an annular space extending circumferentially of the liner and defined between overlapping portions of telescoping liner segments, a cooling fluid plenum substantially circumscribing the liner, means for transferring cooling fluid from the plenum to the space, means for exhausting fluid from the space onto the liner, and an overhanging lip extending substantially axially downstream of the space for facilitating attachment of the fluid to the liner in a protective film barrier, the improveMent comprising: a stabilizing dimple disposed within said lip, the dimple including a substantially radially depressed portion, the depressed portion having a first circumferential width proximate its upstream extremity and a second circumferential width proximate its downstream extremity, the first width being greater than the second.
Claim 2
Dependent Claim 129 words
In a combustor liner film cooling slot of the variety including an annular space extending circumferentially of the liner and defined between overlapping portions of telescoping liner segments, a cooling fluid plenum substantially circumscribing the liner, means for transferring cooling fluid from the plenum to the space, means for exhausting fluid from the space onto the liner, and an overhanging lip extending substantially axially downstream of the space for facilitating attachment of the fluid to the liner in a protective film barrier, the improveMent comprising: a stabilizing dimple disposed within said lip, the dimple including a substantially radially depressed portion, the depressed portion having a first circumferential width proximate its upstream extremity and a second circumferential width proximate its downstream extremity, the first width being greater than the second.
Claim 3
Dependent Claim 20 words
The improvement of claim 1 wherein said lip terminates in a downstream edge, and said dimple extends to said edge.
Claim 4
Dependent Claim 41 words
The improvement of claim 1 wherein said depressed portion departs from the surface of said lip to a first depth proximate its upstream extremity and to a second depth proximate its downstream extremity, said second depth being greater than the first.
Claim 5
Dependent Claim 24 words
The improvement of claim 1 wherein said upstream extremity of said depressed portion is substantially linear and said downstream extremity thereof is substantially arcuate.
Claim 6
Dependent Claim 23 words
The improvement of claim 1 wherein said depresssed portion further includes lateral xtremities, and said lateral extremities substantially converge in the downstream direction.
Claim 7
Dependent Claim 21 words
The improvement of claim 5 further including a plurality of said dimples so characterized, said dimples spaced circumferentially about said lip.
Claim 8
Dependent Claim 20 words
The improvement of claim 6 wherein adjacent of the lateral extremities of adjacent dimples substantially diverge in the downstream direction.
Claim 9
Dependent Claim 47 words
The improvement of claim 7 wherein said depressed portion of each of said dimples departs from the surface of said lip to a first depth proximate its upstream extremity and to a second depth proximate its downstream extremity, said second depth being greater than said first depth.
Claim 10
Dependent Claim 14 words
The improvement of claim 8 wherein said depressed portion extends radially toward said liner.

References Cited (Backward Citations)

US3307354A Cited
US3589127A Cited
US3745766A Cited
US3751910A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-07-29 1978-01-28 1978-07-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-07-29 1982-01-28 1982-07-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-07-29 1986-01-28 1986-07-30 $7700.00 Window Closed / Lapsed

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