Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1993-01-04
1994-02-01
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...
416228, 416237, 4151731, F01D 518, F01D 520
Patent
active
052827216
ABSTRACT:
Spent cooling air from the internal passage(s) in a turbine blade of a gas turbine engine are judiciously located to inject air at the pressure side of the blade in proximity to or in the gap between the tip of the blade and outer air seal to reduce leakage in the gap and improve engine performance. In one embodiment, a projection at the tip of the blade on the pressure side is utilized in combination with an angled discharge passageway and in another embodiment a pair of discharge angled passages, one interconnecting an internal passage on the pressure side and the other connecting an internal passage on the suction side of the blade is utilized. A projection at the tip adjacent the pressure side may also be incorporated in the second embodiment.
REFERENCES:
patent: 1955929 (1934-04-01), Mueller
patent: 4390320 (1983-06-01), Eiswerth
patent: 4589823 (1986-05-01), Koffel
patent: 4863348 (1989-09-01), Weinhold
Friedland Norman
Larson James A.
Look Edward K.
United Technologies Corporation
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