Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1984-12-21
1986-07-22
Garrett, Robert E.
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
046016384
ABSTRACT:
A turbine airfoil for high temperature applications has a spanwise trailing edge slot and a cut back pressure side wall. The pressure side wall has a thickness t at its downstream end. The slot is divided into channels which discharge a film of cooling air over the exposed back surface of the suction side wall downstream of the cut back pressure side wall. Each channel tapers from a throat at its upstream end (which meters the flow of cooling air) to the slot outlet of width s. The airfoil is designed with a ratio t/s of no more than 0.7 which significantly improves cooling of the trailing edge, reduces required cooling air flow, and permits greater cut back distances.
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Auxier Thomas
Hill Edward C.
Liang George P.
Garrett Robert E.
Li H. Edward
Revis Stephen E.
United Technologies Corporation
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