Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1990-11-28
1993-03-09
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
415115, F01D 518
Patent
active
051921928
ABSTRACT:
In an axial flow turbo-machine such as a gas turbine engine, a foil cap for hollow blades or cantilevered vanes, aft of the combustion chamber thereof is provided, the cap having cooling apertures therethrough which diverge from inside to outside thereof, the improvement being, placing at least some of such cooling apertures to intersect with the junction of end and side surfaces of such cap, to scallop same, so that such cooling apertures cannot be blocked by contact of such cap with a clearance control body in such engine. The so-positioned junction-intersecting, cooling apertures, intersect the foil cap surfaces at an angle and lay down a cooling air film on the end and side surfaces of such cap, even when the cap is contacted with the clearance control body, to maintain a cooling film shield thereon against high temperature engine combustion gases and to reduce the oxidation and erosion of such foil cap that would otherwise occur.
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Larson James A.
Look Edward K.
Singer Donald J.
Stover Thomas C.
The United States of America as represented by The Secretary of
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