Patent ID: 8147207
Filing Date: 2012-04-03
Classification: F04D,F05D,Y02T

Abstract:
1. A compressor airfoil for pressurizing air inside a surrounding casing, said airfoil comprising: laterally opposite pressure and suction sides joined together at chordally opposite leading and trailing edges and extending in span from a root to a tip; a radially inner portion and a radially outer portion of said airfoil defined along said span; a leading edge aerodynamic sweep defined relative to a stream surface of flow passing said airfoil; a leading edge aerodynamic dihedral defined relative to said stream surface; and a ratio of said leading edge sweep to said leading edge dihedral being in a range effective to reduce losses generated by interaction of tip clearance flow, secondary flows and passage shocks, said ratio being between about 1:1 to about 3:1 along said radially outer portion to said airfoil.