Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Reexamination Certificate
2006-10-06
2009-10-06
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
07597540
ABSTRACT:
A showerhead cooling arrangement for a turbine airfoil in which the showerhead includes a row of film cooling holes on the stagnation point of the leading edge, a row of pressure side film cooling holes, and a row of suction side film cooling holes to form the showerhead. The pressure and suction side film cooling holes eject cooling air in an upward direction of the airfoil leading edge, while the stagnation row film cooling holes eject cooling air in a downward direction in order to eliminate the film over lapping problem and yield a uniform film layer for the leading edge. In one embodiment, two rows of stagnation point film cooling holes are used to form a four hole showerhead. In other embodiments, one row or more than two rows of stagnation point cooling holes are used. In another embodiment, the stagnation point cooling holes can be two holes joined together at the mid-points.
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Edgar Richard
Florida Turbine Technologies, Inc.
Ryznic John
LandOfFree
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