US3851466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion apparatus
Assignee: Motors Liquidation Co
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Filing: 1973-04-12
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Granted: 1974-12-03
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Expires: 1993-04-12
Abstract
Abstract A combustion apparatus for a regenerative gas turbine engine includes a combustion liner providing for prevaporization and premixing of fuel, for extended residence time after primary combustion, and for delayed dilution of the combustion products. The liner includes a premix-prevaporiation zone with relatively small cross-sectional area, with fuel injecting means at the upstream end. Air flows without swirl through this zone, and through a flare in the liner where the cross section area increases greatly into the combustion zone. A centerbody in the flare directs flow along the inner surface of the wall and additionally heats the fuel-air mixture. Supports for the centerbody define spaced chutes for the air entering the combustion apparatus, and vanes extending inwardly from the wall downstream of the flare deflect the flow from the chutes toward the center of the combustion zone. Combustion air is admitted only through the premix-prevaporization zone. The combuston zone and part of a residence zone downstream of the combustion zone are cooled by convection only, using dilution air. Entrance holes for dilution air are near the downstream end of the liner.
Inventors
- 👤 A Verdouw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:04
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/28; F23R3/286; F23R3/02; F23R3/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
349 words
A combustion apparatus for a regenerative gas turbine engine or the like comprising, in combination, a casing having an upstream portion and a downstream portion and having an entrance for hot compressed air in the upstream portion; a combustion liner disposed within the casing having an upstream end in the upstream portion of the casing and a downstream end in the downstream portion of the casing; the casing and liner defining between them a space for the compressed air discharging into the liner, and the liner defining an outlet for combustion products at its downstream end; the liner including wall means defining, in flow sequence from its upstream end, a premix-prevaporization zone, a combustion zone, and a dilution zone; the premixprevaporization zone having an open upstream end defining a primary air inlet adapted to admit air flowing axially of the zone without significant circumferential velocity; means in the air inlet for carburetting the air; the wall means defining a flare from the premix-prevaporization zone into the combustion zone; a centerbody disposed centrally of the flare effective to guide the flow along the inner surface of the wall means at the flare, the centerbody serving to heat additionally the carburetted air; the combustion zone being located immediately downstream of the flare and having substantially greater crosssectional area than the premix-prevaporization zone, and including means effective to promote circulation and mixing in the combustion zone; shroud means spaced outwardly from the wall means extending downstream from the flare over the combustion zone effective to define a shallow flow path for convection cooling air over the exterior of the wall means; and blocking means between the shroud means and casing disposed between the upstream and downstream portions of the casing effective to direct a major portion of dilution air through the said flow path; the dilution zone of the liner having dilution air entrance holes through the wall means adjacent to the downstream end of the liner to admit dilution air from the downstream portion of the casing; and the liner wall means between the premixprevaporization and dilution zones being substantially imperforate.
Claim 2
Dependent Claim
349 words
A combustion apparatus for a regenerative gas turbine engine or the like comprising, in combination, a casing having an upstream portion and a downstream portion and having an entrance for hot compressed air in the upstream portion; a combustion liner disposed within the casing having an upstream end in the upstream portion of the casing and a downstream end in the downstream portion of the casing; the casing and liner defining between them a space for the compressed air discharging into the liner, and the liner defining an outlet for combustion products at its downstream end; the liner including wall means defining, in flow sequence from its upstream end, a premix-prevaporization zone, a combustion zone, and a dilution zone; the premixprevaporization zone having an open upstream end defining a primary air inlet adapted to admit air flowing axially of the zone without significant circumferential velocity; means in the air inlet for carburetting the air; the wall means defining a flare from the premix-prevaporization zone into the combustion zone; a centerbody disposed centrally of the flare effective to guide the flow along the inner surface of the wall means at the flare, the centerbody serving to heat additionally the carburetted air; the combustion zone being located immediately downstream of the flare and having substantially greater crosssectional area than the premix-prevaporization zone, and including means effective to promote circulation and mixing in the combustion zone; shroud means spaced outwardly from the wall means extending downstream from the flare over the combustion zone effective to define a shallow flow path for convection cooling air over the exterior of the wall means; and blocking means between the shroud means and casing disposed between the upstream and downstream portions of the casing effective to direct a major portion of dilution air through the said flow path; the dilution zone of the liner having dilution air entrance holes through the wall means adjacent to the downstream end of the liner to admit dilution air from the downstream portion of the casing; and the liner wall means between the premixprevaporization and dilution zones being substantially imperforate.
Claim 3
Dependent Claim
370 words
A combustion apparatus for a regenerative gas turbine engine or the like comprising, in combination, a casing having an upstream portion and a downstream portion and having an entrance for hot compressed air in the upstream portion; a combustion liner disposed within the casing having an upstream end in the upstream portion of the casing and a downstream end in the downstream portion of the casing; the casing and liner defining between them a space for the compressed air discharging into the liner, and the liner defining an outlet for combustion products at its downstream end; the liner including wall means defining, in flow sequence from its upstream end, a premix-prevaporization zone, a combustion zone, and a dilution zone; the premix-prevaporization zone having an open upstream end defining a primary air inlet adapted to admit air flowing axially of the zone without significant circumferential velocity; means in the air inlet for carburetting the air; the wall means defining a flare from the premix-prevaporization zone into the combustion zone; a centerbody disposed centrally of the flare effective to guide the flow along the inner surface of the wall means at the flare, the centerbody serving to heat additionally the carburetted air; guide means connecting the centerbody to the wall means defining spaced chutes for the air and blocking flow between the chutes; the combustion zone being located immediately downstream of the flare and having substantially greater cross-sectional area than the premix-prevaporization zone, and including means effective to promote circulation and mixing in the combustion zone; shroud means spaced outwardly from thE wall means extending downstream from the flare over the combustion zone effective to define a shallow flow path for convection cooling air over the exterior of the wall means; and blocking means between the shroud means and casing disposed between the upstream and downstream portions of the casing effective to direct a major portion of dilution air through the said flow path; the dilution zone of the liner having dilution air entrance holes through the wall means adjacent to the downstream end of the liner to admit dilution air from the downstream portion of the casing; and the liner wall means between the premix-prevaporization and dilution zones being substantially imperforate.
Claim 4
Dependent Claim
370 words
A combustion apparatus for a regenerative gas turbine engine or the like comprising, in combination, a casing having an upstream portion and a downstream portion and having an entrance for hot compressed air in the upstream portion; a combustion liner disposed within the casing having an upstream end in the upstream portion of the casing and a downstream end in the downstream portion of the casing; the casing and liner defining between them a space for the compressed air discharging into the liner, and the liner defining an outlet for combustion products at its downstream end; the liner including wall means defining, in flow sequence from its upstream end, a premix-prevaporization zone, a combustion zone, and a dilution zone; the premix-prevaporization zone having an open upstream end defining a primary air inlet adapted to admit air flowing axially of the zone without significant circumferential velocity; means in the air inlet for carburetting the air; the wall means defining a flare from the premix-prevaporization zone into the combustion zone; a centerbody disposed centrally of the flare effective to guide the flow along the inner surface of the wall means at the flare, the centerbody serving to heat additionally the carburetted air; guide means connecting the centerbody to the wall means defining spaced chutes for the air and blocking flow between the chutes; the combustion zone being located immediately downstream of the flare and having substantially greater cross-sectional area than the premix-prevaporization zone, and including means effective to promote circulation and mixing in the combustion zone; shroud means spaced outwardly from thE wall means extending downstream from the flare over the combustion zone effective to define a shallow flow path for convection cooling air over the exterior of the wall means; and blocking means between the shroud means and casing disposed between the upstream and downstream portions of the casing effective to direct a major portion of dilution air through the said flow path; the dilution zone of the liner having dilution air entrance holes through the wall means adjacent to the downstream end of the liner to admit dilution air from the downstream portion of the casing; and the liner wall means between the premix-prevaporization and dilution zones being substantially imperforate.
Claim 5
Dependent Claim
384 words
A combustion apparatus for a regenerative gas turbine engine or the like comprising, in combination, a casing having an upstream portion and a downstream portion and having an entrance for hot compressed air in the upstream portion; a combustion liner disposed within the casing having an upstream end in the upstream portion of the casing and a downstream end in the downstream portion of the casing; the casing and liner defining between them a space for the compressed air discharging into the liner, and the liner defining an outlet for combustion products at its downstream end; the liner including wall means defining, in flow sequence from its upstream end, a premix-prevaporization zone, a combustion zone, and a dilution zone; the premix-prevaporization zone having an open upstream end defining a primary air inlet adapted to admit air flowing axially of the zone without significant circumferential velocity; means in the air inlet for carburetting the air; the wall means defining a flare from the premix-prevaporization zone into the combustion zone; a centerbody disposed centrally of the flare effective to guide the flow along the inner surface of the wall means at the flare, the centerbody serving to heat additionally the carburetted air; guide means connecting the centerbody to the wall means defining spaced chutes for the air and blocking flow between the chutes; the combustion zone being located immediately downstream of the flare and having substantially greater cross-sectional area than the premix-prevaporization zone, and including stirring vanes extending from the wall means into the path of flow from the chutes effective to promote circulation and mixing in the combustion zone; shroud means spaced outwardly from the wall means extending downstream from the flare over the combustion zone effective to define a shallow flow path for convection cooling air over the exterior of the wall means; and blocking means between the shroud means and casing disposed between the upstream and downstream portions of the casing effective to direct a major portion of dilution air through the said flow path; the dilution zone of the liner having dilution air entrance holes through the wall means adjacent to the downstream end of the liner to admit dilution air from the downstream portion of the casing; and the liner wall means between the premix-prevaporization and dilution zones being substantially imperforate.
Claim 6
Dependent Claim
384 words
A combustion apparatus for a regenerative gas turbine engine or the like comprising, in combination, a casing having an upstream portion and a downstream portion and having an entrance for hot compressed air in the upstream portion; a combustion liner disposed within the casing having an upstream end in the upstream portion of the casing and a downstream end in the downstream portion of the casing; the casing and liner defining between them a space for the compressed air discharging into the liner, and the liner defining an outlet for combustion products at its downstream end; the liner including wall means defining, in flow sequence from its upstream end, a premix-prevaporization zone, a combustion zone, and a dilution zone; the premix-prevaporization zone having an open upstream end defining a primary air inlet adapted to admit air flowing axially of the zone without significant circumferential velocity; means in the air inlet for carburetting the air; the wall means defining a flare from the premix-prevaporization zone into the combustion zone; a centerbody disposed centrally of the flare effective to guide the flow along the inner surface of the wall means at the flare, the centerbody serving to heat additionally the carburetted air; guide means connecting the centerbody to the wall means defining spaced chutes for the air and blocking flow between the chutes; the combustion zone being located immediately downstream of the flare and having substantially greater cross-sectional area than the premix-prevaporization zone, and including stirring vanes extending from the wall means into the path of flow from the chutes effective to promote circulation and mixing in the combustion zone; shroud means spaced outwardly from the wall means extending downstream from the flare over the combustion zone effective to define a shallow flow path for convection cooling air over the exterior of the wall means; and blocking means between the shroud means and casing disposed between the upstream and downstream portions of the casing effective to direct a major portion of dilution air through the said flow path; the dilution zone of the liner having dilution air entrance holes through the wall means adjacent to the downstream end of the liner to admit dilution air from the downstream portion of the casing; and the liner wall means between the premix-prevaporization and dilution zones being substantially imperforate.
Claim 7
Dependent Claim
352 words
A combustion apparatus for a regenerative gas turbine engine or the like comprising, in combination, a casing having an upstream portion and a downstream portion and having an entrance for hot compressed air in the upstream portion; a combustion liner disposed within the casing having an upstream end in the upstream portion of the casing and a downstream end in the downstream portion of the casing; the casing and liner defining between them a space for the compressed air discharging into the liner, and the liner defining an outlet for combustion products at its downstream end; the liner including wall means defining, in flow sequence from its upstream end, a premix-prevaporization zone, a combustion zone, a residence zone, and a dilution zone; the premix-prevaporization zone having an open upstream end defining a primary air inlet adapted to admit air flowing axially of the zone without significant circumferential velocity; means in the air inlet for carburetting the air; the wall means defining a flare from the premix-prevaporization zone into the combustion zone; a centerbody disposed centrally of the flare effective to guide the flow along the inner surface of the wall means at the flare, the centerbody serving to heat additionally the carburetted air; the combustion zone being located immediately downstream of the flare and having substantially greater cross-sectional area than the premix-prevaporization zone, and including means effective to promote circulation and mixing in the combustion zone; shroud means spaced outwardly from the wall means extending downstream from the flare over the combustion zone effective to define a shallow flow path for convection cooling air over the exterior of the wall means; and blocking means between the shroud means and casing disposed between the upstream and downstream portions of the casing effective to direct a major portion of dilution air through the said flow path; the dilution zone of the liner having dilution air entrance holes through the wall means adjacent to the downstream end of the liner to admit dilution air from the downstream portion of the casing; and the liner wall means at the combustion and residence zones being substantially imperforate.
Claim 8
Dependent Claim
352 words
A combustion apparatus for a regenerative gas turbine engine or the like comprising, in combination, a casing having an upstream portion and a downstream portion and having an entrance for hot compressed air in the upstream portion; a combustion liner disposed within the casing having an upstream end in the upstream portion of the casing and a downstream end in the downstream portion of the casing; the casing and liner defining between them a space for the compressed air discharging into the liner, and the liner defining an outlet for combustion products at its downstream end; the liner including wall means defining, in flow sequence from its upstream end, a premix-prevaporization zone, a combustion zone, a residence zone, and a dilution zone; the premix-prevaporization zone having an open upstream end defining a primary air inlet adapted to admit air flowing axially of the zone without significant circumferential velocity; means in the air inlet for carburetting the air; the wall means defining a flare from the premix-prevaporization zone into the combustion zone; a centerbody disposed centrally of the flare effective to guide the flow along the inner surface of the wall means at the flare, the centerbody serving to heat additionally the carburetted air; the combustion zone being located immediately downstream of the flare and having substantially greater cross-sectional area than the premix-prevaporization zone, and including means effective to promote circulation and mixing in the combustion zone; shroud means spaced outwardly from the wall means extending downstream from the flare over the combustion zone effective to define a shallow flow path for convection cooling air over the exterior of the wall means; and blocking means between the shroud means and casing disposed between the upstream and downstream portions of the casing effective to direct a major portion of dilution air through the said flow path; the dilution zone of the liner having dilution air entrance holes through the wall means adjacent to the downstream end of the liner to admit dilution air from the downstream portion of the casing; and the liner wall means at the combustion and residence zones being substantially imperforate.
Claim 9
Dependent Claim
387 words
A combustion apparatus for a regenerative gas turbine engine or the like comprising, in combination, a casing having an upstream portion and a downstream portion and having an entrance for hot compressed air in the upstream portion; a combustion liner disposed within the casing having an upstream end in the upstream portion of the casing and a downstream end in the downstream portion of the casing; the casing and liner defining between them a space for the compressed air discharging into the liner, and the liner defining an outlet for combustion products at its downstream end; the liner including wall means defining, in flow sequence from its upstream end, a premix-prevaporization zone, a combustion zone, a residence zone, and a dilution zone; the premix-prevaporization zone having an open upstream end defining a primary air inlet adapted to admit air flowing axially of the zone without significant circumferential velocity; means in the air inlet for carburetting the air; the wall means defining a flare from the premix-prevaporization zone into the combustion zone; a centerbody disposed centrally of the flare effective to guide the flow along the inner surface of the wall means at the flare, the centerbody serving to heat additionally the carburetted air; guide means connecting the centerbody to the wall means defining spaced chutes for the air and blocking flow between the chutes; the combustion zone being located immediately downstream of the flare and having substantially greater cross-sectional area than the premix-prevaporization zone, and including stirring vanes extending from the wall means into the path of flow from the chutes effective to promote circulation and mixing in the combustion zone; shroud means spaced outwardly from the wall means extending downstream from the flare over the combustion zone effective to define a shallow flow path for convection cooling air over the exterior of the wall means; and blocking means between the shroud means and casing disposed between the upstream and downstream portions of the casing effective to direct the major portion of dilution air through the said flow path; the dilution zone of the liner having dilution air entrance holes through the wall means adjacent to the downstream end of the liner to admit dilution air from the downstream portion of the casing; and the liner wall means at the combustion and residence zones being substantially imperforate.
Claim 10
Dependent Claim
387 words
A combustion apparatus for a regenerative gas turbine engine or the like comprising, in combination, a casing having an upstream portion and a downstream portion and having an entrance for hot compressed air in the upstream portion; a combustion liner disposed within the casing having an upstream end in the upstream portion of the casing and a downstream end in the downstream portion of the casing; the casing and liner defining between them a space for the compressed air discharging into the liner, and the liner defining an outlet for combustion products at its downstream end; the liner including wall means defining, in flow sequence from its upstream end, a premix-prevaporization zone, a combustion zone, a residence zone, and a dilution zone; the premix-prevaporization zone having an open upstream end defining a primary air inlet adapted to admit air flowing axially of the zone without significant circumferential velocity; means in the air inlet for carburetting the air; the wall means defining a flare from the premix-prevaporization zone into the combustion zone; a centerbody disposed centrally of the flare effective to guide the flow along the inner surface of the wall means at the flare, the centerbody serving to heat additionally the carburetted air; guide means connecting the centerbody to the wall means defining spaced chutes for the air and blocking flow between the chutes; the combustion zone being located immediately downstream of the flare and having substantially greater cross-sectional area than the premix-prevaporization zone, and including stirring vanes extending from the wall means into the path of flow from the chutes effective to promote circulation and mixing in the combustion zone; shroud means spaced outwardly from the wall means extending downstream from the flare over the combustion zone effective to define a shallow flow path for convection cooling air over the exterior of the wall means; and blocking means between the shroud means and casing disposed between the upstream and downstream portions of the casing effective to direct the major portion of dilution air through the said flow path; the dilution zone of the liner having dilution air entrance holes through the wall means adjacent to the downstream end of the liner to admit dilution air from the downstream portion of the casing; and the liner wall means at the combustion and residence zones being substantially imperforate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |