Turbine airfoil with near-wall cooling

Details Turbine airfoil with near-wall cooling Turbine airfoil with near-wall cooling

2007-09-21

2010-12-28

Kershteyn, Igor (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

With heating, cooling or thermal insulation means

Changing state mass within or fluid flow through working...

Reexamination Certificate

active

07857589

ABSTRACT:
A turbine airfoil having a mini-serpentine flow cooling circuit on the leading edge portion to provide both convective and film cooling for the leading edge portion. The mini-serpentine flow cooling circuits are formed as separate modules, each module including a three-pass or a five-pass serpentine flow circuit with the first leg on one side of the leading edge and the last leg on the other side of the leading edge such that the middle leg of the serpentine flow circuit for each module is located along the stagnation line of the airfoil. Film cooling holes discharge cooling air from each leg onto the airfoil surface. Each module includes a metering and impingement hole located on the bottom of the first leg to individually meter cooling air from the cooling supply cavity.

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