Patent ID: 7966831
Filing Date: 2011-06-28
Classification: F02C,F02K,F05D,Y02T

Abstract:
1. An apparatus for suppressing dynamic pressure instability in a bleed duct of a gas turbine engine, the apparatus comprising: a fan bypass duct configured to permit a flow of air through the gas turbine engine during operation of the engine, the fan bypass duct defining a fan duct surface; a bleed duct having an inlet in fluid communication with the fan bypass duct and a flow control valve having an opened position and a closed position; and a flow diverter positioned on the fan duct surface in an upstream direction from the inlet of the bleed duct for diverting the flow of air through the gas turbine engine so that the flow of air is directed away from the inlet when the flow control valve is in the closed position, wherein the flow diverter has an upstream end and a downstream end proximate the inlet of the bleed duct, and wherein the flow diverter defines a ramp surface extending between the upstream end and the downstream end and spaced outwardly from the fan duct surface.