Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1984-02-15
1985-07-16
Cline, William R.
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
045293589
ABSTRACT:
It is an object of the invention to provide a film cooling apparatus of increased effectiveness and efficiency. In accordance with the invention, a cooling fluid is injected into a hot flowing gas through a passageway in a wall which contains and is subject to the hot gas. The passageway is slanted in a downstream direction at an acute angle to the wall. A cusp shape is provided in the passageway to generate vortices in the injected cooling fluid thereby reducing the energy extracted from the hot gas for that purpose. The cusp shape increases both film cooling effectiveness and wall area coverage. The cusp may be at either the downstream or upstream side of the passageway, the former substantially eliminating flow separation of the cooling fluid from the wall immediately downstream of the passageway.
REFERENCES:
patent: Re14072 (1916-02-01), Harrison
patent: 1597885 (1926-08-01), Harris
patent: 2058057 (1936-10-01), Brunst
patent: 3525486 (1970-08-01), Wimpenny
patent: 3606572 (1971-09-01), Schwedland
patent: 3796258 (1974-03-01), Malhortra et al.
patent: 4376004 (1983-03-01), Bratton et al.
Cline William R.
Mackin James A.
Manning John R.
McGlew, Jr. John J.
The United States of America as represented by the Administrator
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