Turbine blade including revised trailing edge cooling

Details Turbine blade including revised trailing edge cooling Turbine blade including revised trailing edge cooling

2005-08-16

2008-11-18

Edgar, Richard (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

07452186

ABSTRACT:
The present invention provides an improved cooling circuit for a trailing edge of a turbine blade. The cooling circuit includes an inlet passage that receives a airflow and distributes the airflow through a feed passage. The feed passage primarily includes trip strips, at least one barrier including cross-over holes, teardrop shaped protrusions, and pockets disposed along a trailing edge. The geometry and positioning of both the cross-over holes and teardrop shaped protrusions downstream of the cross-over holes have been optimized to maximize cooling efficiency and reduce airflow. An improved transition between the inlet passage and the feed passage is also provided, which is arcuate and allows the airflow to maintain attachment and flow unimpeded from the inlet passage to the feed passage. The geometry of the pockets disposed along the trailing edge is optimized to improve cooling.

REFERENCES:
patent: 5337805 (1994-08-01), Green et al.
patent: 5378108 (1995-01-01), Zelesky
patent: 6139269 (2000-10-01), Liang
patent: 6234754 (2001-05-01), Zelesky et al.
patent: 7008186 (2006-03-01), Heeg et al.

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