Damping means for hollow stator vane airfoils

摘要

Damping for the airfoils of stator vanes is provided by a spring damper formed from an elongated spring element bent into a "U" or "V" shape in cross section and oriented in the hollow of the airfoil so that the legs of the "U" or "V" frictionally engage the inner surfaces of the opposing pressure side and suction side walls of the airfoil to dissipate the vibratory energy. The elongated spring element is inserted through a hole formed on one end of the airfoil to extend just short of one of the ends of the airfoil to form a cantilevered mounted spring. The edge of the legs may be scalloped to allow the passage of air from one inner surface to the other of the airfoil.