Temperature variance reduction using variable penetration dilution jets
AssigneeHoneywell International Inc.
InventorsJurgen C. Schumacher, Ian L. Critchley, David G. Walhood
Life of this patent
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Abstract
A variable penetration dilution jet array for a single can and scroll assembly includes a plurality of differentially sized dilution openings around the circumference of the combustor can. The alternating smaller and larger openings provide for circumferential and radial mixing uniformity with the smaller openings giving shallow penetration and the larger openings enabling deep core penetration. The larger openings provide dilution air to the hot gas flow core without the need for an increase in combustor pressure drop. The smaller openings provide a film cooling flow to the downstream scroll, reducing dedicated scroll cooling requirements.
Claims33
A combustor assembly comprising:
- a combustor can used with a scroll;
- and
- a variable penetration dilution jet array positioned in an aft portion of said combustor can there through, said variable penetration dilution jet array providing a dilution air flow such that a pattern factor at an exit plane of said combustor can is reduced and provides a film cooling flow to said scroll.
A can-and-scroll combustor assembly comprising:
- a combustor can;
- a scroll positioned downstream and in flow communication with said combustor can;
- a plurality of scroll cooling openings through said combustor can, said scroll cooling openings provide a film cooling flow to said scroll;
- and
- a plurality of core penetrating openings through said combustor can, said core penetrating openings provide dilution air to a hot gas flow core of said combustor can.
A variable penetration dilution jet array for an assembly having a combustor can and a scroll comprising:
- a plurality of core penetrating openings positioned circumferentially about said combustor can;
- a plurality of scroll cooling openings positioned circumferentially about said combustor can, said scroll cooling openings offset from said core penetrating openings;
- and
- a plurality of intermediate openings positioned circumferentially about said combustor can, said intermediate openings offset from said core penetrating openings.
A combustor assembly for a turbine engine having a scroll comprising:
- a combustor can;
- a plurality of core penetrating openings circumferentially positioned about an axial plane of said combustor can, said core penetrating openings uniformly spaced;
- and
- a plurality of scroll cooling openings circumferentially positioned about said axial plane of said combustor, said scroll cooling openings uniformly spaced.
An apparatus for a can-and-scroll combustor assembly comprising:
- at least one core penetrating opening through an aft end portion of said combustor can, said core penetrating opening providing dilution air to a hot gas flow core of said can;
- at least one scroll cooling opening through said aft end portion of said combustor can, said scroll cooling opening providing a film cooling flow to said scroll;
- and
- at least one intermediate opening through said aft end portion of said combustor can, said intermediate opening flow reducing temperature variation at the exit plane of said combustor can.
A method of providing dilution air to a combustor can-and-scroll assembly comprising the steps of:
- projecting a first portion of dilution air through at least one axial plane of said combustor can such that a film cooling flow is provided to said scroll;
- and
- projecting a second portion of dilution air through at least one axial plane of said such combustor can such that the temperature of a hot gas flow core of said can is reduced.
Dependencies are inferred from the claim text.