Design of a High Pressure Ratio Centrifugal Compressor

Abstract

High pressure ratio centrifugal compressor has gained widely attention recently. In this paper, a pressure ratio 11 centrifugal compressor with an inlet mach number of about 1.6 is preliminary designed by computer. The complex shock boundary layer interaction, low energy region in the vicinity of the casing and the outlet flow conditions are analyzed. The vaneless and vaned diffusers are also designed. CFD results show that the vaned diffuser can effectively improve the compressor efficiency.