Research/Patents/US 5688107
US 5688107

TURBINE BLADE PASSIVE CLEARANCE CONTROL

Assignee

UNITED TECHNOLOGIES CORPORATION

Filed

Dec 28, 1992

Granted

Nov 18, 1997

Location

JUPITER FL US

Abstract

Intersecting judiciously located installed holes at the tip section of the airfoil of an internally cooled axial flow turbine blade for a gas turbine engine communicating with a passage adjacent the pressure side and another passage adjacent the suction side of the airfoil provide a resultant flow that creates an aerodynamic seal that opposes the flow of engine working medium leaking into the clearance between the tip of the airfoil and the surrounding annular shroud or outer air seal. The installed holes are in proximity to the intersection of the tip surface with the airfoil pressure side surface.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Apr 19, 1993

Rescinded

Mar 18, 1997

Duration

3 years, 11 months

Inventor

  • 1JAMES P. DOWNS

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records