A three-dimensional numerical calculation code called CSAC based on body force model was developed and used to predict fan/compressor performance with inlet distortion. First

the modeling method to build body force model was studied. Then

a three-dimensional numerical calculation code was developed. A single-stage transonic compressor flow field with clean inlet was simulated with the code. The calculation results agreed well with the solutions of Reynolds-averaged Navier-Stokes(RANS) and experimental data. The compressor flow field with inlet steady circumferential total pressure distortion and circumferential total temperature distortion were simulated respectively with the code. The results showed that the flow field with inlet distortion in compressor had large scale and strong three-dimensional features

which led to the decrease of compressor total pressure ratio and stability margin. All results show that this model can effectively analyze the effect of inlet distortion on compressor while reducing the dependency on computational resources and engineering experience.