Turbomachine aerofoil with concave surface irregularities

Details Turbomachine aerofoil with concave surface irregularities Turbomachine aerofoil with concave surface irregularities

1995-06-27

1997-03-11

Larson, James

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Axially extending shroud ring or casing

416235, 416236R, 415914, F01D 514

Patent

active

056094701

ABSTRACT:
A cast and hot isostatically pressed gamma titanium aluminide turbine blade has an aerofoil portion including a concave pressure surface and a convex suction surface. The concave pressure surface has surface irregularities, produced by the action of the hot isostatic pressing process on voids located within the cast turbine blade, located in that region of the concave pressure surface where in operation aerodynamic separation occurs to minimise the aerodynamic effects of the surface irregularities upon the operation of the turbine blade. The remaining portion of the concave pressure surface and the whole of the convex suction surface are substantially free of surface irregularities.

REFERENCES:
patent: 1903823 (1933-04-01), Lougheed
patent: 4302256 (1981-11-01), Kenton
patent: 5169290 (1992-12-01), Chou
patent: 5209644 (1993-05-01), Dorman
patent: 5299353 (1994-04-01), Nazmy et al.

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