Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Patent
1981-06-26
1983-10-04
Coe, Philip 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
044076320
ABSTRACT:
The trailing edge region of an airfoil includes a slot formed between the pressure and suction side walls with an array of pedestals extending across the slot, wherein selected pairs of pedestals are connected by a barrier wall adjacent either the pressure or suction side of the slot. The barrier walls extend inwardly toward the opposite side wall only partway across the slot to trip the thermal boundary layer of the cooling air flowing in the slot. These barrier walls alternate, in the downstream direction, between the pressure side and the suction side of the slot such that cooling air flowing downstream must move back and forth between the pressure and suction side walls in order to pass over these walls. Simultaneously, as the cooling air travels downstream, it snakes around the pedestals. The result is that the cooling air flows through the slot along a plurality of spiral or vortex-like flow paths resulting in improved heat transfer.
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Gas Turbine Intl., Jul-Aug. vol. 18, No. 4, p. 51 "Detroit Diesel Allison's 570-K".
Coe Philip R.
Revis Stephen E.
Stinson Frankie L.
United Technologies Corporation
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