Shaped cooling holes for reduced stress

Details Shaped cooling holes for reduced stress Shaped cooling holes for reduced stress

2008-11-25

2011-11-29

Sarkar, Asok (Department: 2891)

Fluid reaction surfaces (i.e., impellers)

With heating, cooling or thermal insulation means

C415S115000, C415S116000, C416S001000, C416S09300R

Reexamination Certificate

active

08066482

ABSTRACT:
A gas turbine engine component having shaped cooling holes that further enhances the cooling of a desired region while reducing stress levels in and around the cooling holes is disclosed. The cooling holes are generally elliptically-shaped and diffuse from a cooling fluid supply side to a discharge side and are oriented on the turbine component to reduce stress concentrations while directing the cooling fluid to a desired surface or location. The elliptical cooling holes have openings in the surface that have high points that are concentric and planar.

REFERENCES:
patent: 4653983 (1987-03-01), Vehr
patent: 4705455 (1987-11-01), Sahm et al.
patent: 4923371 (1990-05-01), Ben-Amoz
patent: 6287075 (2001-09-01), Kercher
patent: 6435815 (2002-08-01), Harvey et al.
patent: 7887294 (2011-02-01), Liang
patent: 2009/0173834 (2009-07-01), Prince et al.

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