Flow mechanism of air in centrifugal compressor is analyzed in detail. A rapid and simplified mathematical model based on equations and used to simulate centrifugal compressor is developed. A variety of losses occurring in centrifugal compressor are included in the mathematical model. This model has such virtues as speediness and being applicable to large-scale calculations. The computer language Modelica and the editor Dymola are introduced to simulate the performance of centrifugal compressor. S...