Patent ID: 7025568
Filing Date: 2006-04-11
Classification: F01D,F04D,Y10S,Y10T

Abstract:
1. A turbomachine aerofoil comprising a leading edge, a trailing edge, a concave wall portion extending from the leading edge to the trailing edge and a convex wall portion extending from the leading edge to the trailing edge, at least one flexible wall being arranged within the aerofoil to at least partially define a plurality of chambers, the chambers containing a fluid, the chambers being interconnected by apertures such that in operation deflection of the at least one flexible wall by vibrations of the aerofoil produces a flow of fluid between chambers through the apertures which is restricted by the apertures to damp vibrations of the aerofoil wherein the flexible wall is arranged to define a plurality of chambers with an internal surface of the concave wall portion, the flexible wall being arranged substantially parallel to the internal surface of the concave wall portion and at least one wall connecting the internal surface of the convex wall portion and the flexible wall.