Double-wall airfoil

Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...

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416229A, 416241R, F01D 518, F01D 528

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active

056264623

ABSTRACT:
A double-wall airfoil for applications such as the blades and vanes of gas turbine engines. The double-wall comprises an outer airfoil skin and an inner support wall that are metallurgically bonded to one another. The double-wall contains integral channels for passage of cooling air adjacent to the airfoil skin. Airfoil skin may be a metal alloy skin or a microlaminate structure, including microlaminate composite structures. Microlaminate composites typically have a lower density than that of the material used for the airfoil support wall, and a simplified internal geometry which promote weight reductions in the airfoils and increases in engine operating efficiency.

REFERENCES:
patent: 2641439 (1953-06-01), Williams
patent: 3848307 (1974-11-01), Kydd
patent: 4314007 (1982-02-01), Gessinger
patent: 4629397 (1986-12-01), Schweitzer
patent: 5328331 (1994-07-01), Bunker et al.

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