Film effectiveness enhancement using tangential effusion
AssigneeHoneywell International Inc.
InventorsRobert Reynolds, Rodolphe Dudebout
Life of this patent
Estimating the term…
Abstract
Film effectiveness enhancement is provided by a plurality of tangentially angled effusion holes in a combustor liner. The effusion holes positioned in the initial flow region at the start of the panel have a tangential angle between about 75° and about 90° to the combustor axis. The tangential angle of the effusion holes positioned downstream from the initial flow region is gradually reduced to a value corresponding to the bulk swirl of the combustor internal flow or to zero so that the effusion hole orientation at the end of the panel corresponds to that of convention effusion.
Claims30
An apparatus for an effusion cooled component comprising:
- a plurality of initial effusion hole openings positioned in an initial flow region of said effusion cooled component, at least one of said initial effusion hole openings positioned such that a longitudinal line of said effusion cooled component and a centerline of said at least one initial effusion hole opening forms an initial hole tangential angle of between about 75′ and about 90°;
- and
- a plurality of transition openings positioned downstream from said initial effusion hole openings, at least one of said transition openings positioned such that a longitudinal line of said effusion cooled component and a centerline of said at least one transition opening forms a transition hole tangential angle, said transition hole tangential angle having a value less than a value of said initial hole tangential angle.
(canceled)
An effusion array for a component comprising:
- a plurality of effusion hole openings through said component, said plurality of effusion hole openings positioned such that (i) a plurality of initial effusion hole openings are formed in an initial flow region of said component and (ii) at least five circumferential rows of transition openings are formed in a transition region of said component, said plurality of initial effusion hole openings capable of providing an effusion flow at a tangential angle of between about 75° and about 90° to an axis of said component, said at least five circumferential rows of transition openings capable of providing an effusion flow at a tangential angle of less than that of said plurality of initial effusion hole openings.
(canceled)
The effusion array of claim 13, wherein each said transition opening has a diameter between about 0.01 and about 0.05 inches.
The effusion array of clam 11, wherein a density of said initial effusion hole openings is between about 10 and about 100 holes/in2.
A component requiring cooling comprising:
- at least two circumferential rows of initial effusion hole openings through said component, each said initial effusion hole opening positioned such that a longitudinal line of said component and a centerline of said initial effusion hole opening forms an initial hole tangential angle of between about 80° and about 90°;
- and
- at least five circumferential rows of transition openings positioned downstream from said initial effusion hole openings, each said transition opening positioned such that a longitudinal line of said component and a centerline of said transition opening forms a transition hole tangential angle, said transition hole tangential angle having a value less than a value of said initial hole tangential angle.
A combustor for a gas turbine engine comprising:
- an inner liner;
- an outer liner positioned radially outward from said inner liner, said outer liner having at least about two circumferential rows of initial effusion hole openings there through and at least about five circumferential rows of transition openings downstream from said at least about two circumferential rows of initial effusion hole openings, said initial effusion hole openings having a tangential angle between about 75° and about 90° to an axis of said gas turbine engine;
- and
- a dome positioned between and connected to said inner liner and said outer liner.
(canceled)
An effusion array for an annular combustor liner comprising:
- at least three circumferential rows of initial effusion hole openings positioned in an initial flow region of said annular combustor liner, each initial effusion hole opening positioned such that a longitudinal line of said annular combustor liner and a centerline of said initial effusion hole opening forms an initial hole tangential angle of between about 75° and about 90°, each initial effusion hole opening having a diameter between about 0.015 and about 0.030 inches, each initial effusion hole opening forming an axial angle of between about 15° and about 30° with a surface of said annular combustor liner;
- and
- at least five circumferential rows of transition openings positioned downstream from said initial effusion hole openings, each said transition opening positioned such that longitudinal line of said annular combustor liner and a centerline of said transition opening forms a transition hole tangential angle, said transition hole tangential angle having a value of less than a value of said initial hole tangential angle.
A method of enhancing the film effectiveness for an effusion cooled component comprising the step of:
- passing a first portion of effusion flow through a plurality of initial effusion hole openings in an initial flow region of said effusion cooled component, at least one said initial effusion hole opening positioned such that a longitudinal line of said effusion cooled component and a a centerline of said at least one initial effusion hole opening forms an initial hole tangential angle of between about 75° and about 90°;
- and
- passing a second portion of effusion flow through a plurality of transition openings in a transition region of said effusion cooled component, at least one transition opening positioned such that longitudinal line of said effusion cooled component and a centerline of said at least one transition opening forms a transition hole tangential angle, said transition hole tangential angle less than said initial hole tangential angle.
(canceled)
Dependencies are inferred from the claim text.