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Turbine blade cooling

United States Patent

July 20, 1999
View the Complete Patent at the US Patent & Trademark Office
A turbine rotor blade comprises a shank portion, a tip portion and an airfoil. The airfoil has a pressure side wall and a suction side wall that are interconnected by a plurality of partition sidewalls, defining an internal cooling passageway within the airfoil. The internal cooling passageway includes at least one radial outflow passageway to direct a cooling medium flow from the shank portion towards the tip portion and at least one radial inflow passageway to direct a cooling medium flow from the tip portion towards the shank portion. A number of mixing ribs are disposed on the partition sidewalls within the radial outflow passageways so as to enhance the thermal mixing of the cooling medium flow, thereby producing improved heat transfer over a broad range of the Buoyancy number.
Staub; Fred Wolf (Schenectady, NY), Willett; Fred Thomas (Niskayuna, NY)
General Electric Company (Schenectady, NY)
08/ 861,045
May 21, 1997
This invention was made with Government support under Government Contract No. DEAC2193MC30244 awarded by the Department of Energy (DOE). The Government has certain rights to this invention.