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Turbine blade tip with offset squealer

United States Patent

January 30, 2001
View the Complete Patent at the US Patent & Trademark Office
An industrial turbine assembly comprises a plurality of rotating blade portions in a spaced relation with a stationary shroud. The rotating blade includes a root section, an airfoil having a pressure sidewall and a suction sidewall defining an outer periphery and a tip portion having a tip cap. An offset squealer is disposed on the tip cap. The offset squealer is positioned inward from the outer periphery of the rotating blade. The offset squealer increases the flow resistance and reduces the flow of hot gas flow leakage for a given pressure differential across the blade tip portion so as to improve overall turbine efficiency.
Bunker; Ronald Scott (Niskayuna, NY)
General Electric Company (Schenectady, NY)
09/ 323,375
June 1, 1999
This invention was made with government support under government contract number DEFC21-95-MC31176, awarded by the Department of Energy (DOE). The government may have certain rights to this invention.