Design and analysis of a high-speed centrifugal refrigerant compressor

摘要

Compressor is the key equipment of the on-board evaporation cycle system. A complete aerodynamic design method of refrigeration centrifugal compressor is developed in this paper. The method is divided into two parts, which are used to design and analyze separately. Based on the method, a two-stage centrifugal compressor with airfoil diffuser is designed and its performance is predicted. The design rotation rate and pressure ratio are 70000rpm and 4.3 separately. 3D CFD simulation results show that the compressor can meet requirements of the design point of aircraft evaporative refrigeration cycle system.