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US Patent 7147426 Shockwave-induced boundary layer bleed

Patent 7147426 was granted and assigned to Pratt & Whitney Canada on December, 2006 by the United States Patent and Trademark Office.

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Current Assignee
Pratt & Whitney Canada
Pratt & Whitney Canada
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Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
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Patent Number
71474260
Patent Inventor Names
André Denis Leblanc0
Gilbert Ouellet0
Date of Patent
December 12, 2006
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Patent Application Number
108402910
Date Filed
May 7, 2004
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Patent Citations Received
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US Patent 12066027 Variable geometry supersonic compressor
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US Patent 11840939 Gas turbine engine with an airfoil
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Patent Primary Examiner
Christopher Verdier
Christopher Verdier
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Patent abstract

An apparatus and method is provided for improving efficiency of a transonic gas turbine engine compressor by bleeding off a shockwave-induced boundary layer from the gas flow passage of the compressor using an array of bleed holes having a downstream edge aligned with a foot of an oblique shock wave which originates on the leading edge of an adjacent transonic rotor blade tip.

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