Process for cooling a turbine blade trailing edge

Details Process for cooling a turbine blade trailing edge Process for cooling a turbine blade trailing edge

2011-07-07

2011-11-08

Bryant, Kiesha (Department: 2891)

Fluid reaction surfaces (i.e., impellers)

With heating, cooling or thermal insulation means

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

C416S09600A

Reexamination Certificate

active

08052392

ABSTRACT:
A turbine airfoil with a trailing edge cooling circuit that includes a row of pressure side bleed channels connected to a metering and impingement cooling circuit that discharges a layer of film cooling air out through a row of exit slots that open onto a pressure side wall of the trailing edge to provide cooling for the trailing edge region of the airfoil. Formed within the trailing edge tip is a vortex flow chamber extending the length of the airfoil and connected to the bleed channels by a row of inlet holes to draw a portion of the film cooling air into the vortex chamber to provide cooling for the trailing edge tip and to prevent the film cooling layer from breaking off from the pressure side wall. The vortex chamber is connected to a row of exit holes offset from the inlet holes to form the vortex flow and to discharge the vortex flowing cooling air out the trailing edge in a direction parallel to the suction side wall.

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