Body force model for multistage axial compressor-three-dimensional application

The time-marching three-dimensional computational model based on the body force model was used to obtain the general characteristics and flow field of a single-stage transonic compressor with circumferential total pressure inlet distortion. Comparison between calculated and related experimental results was made to verify the accuracy and reliability of the model. Then the internal flow field of a four-stage low speed axial compressor with circumferential total pressure inlet distortion and twin swirl inlet distortion were analyzed in detail respectively by this model. The relative error between the calculated results of the single-stage transonic compressor and the related experimental data was less than 2%, and the distribution of the internal flow field agreed with the experimental measuring data. The calculated results of the four-stage low speed axial compressor reflected that the circumferential total pressure inlet distortion worsened the aerodynamic performance and stability of the compressor while the twin swirl inlet distortion had limited impact. Meanwhile, the travelling process of inlet distortion with different forms in the multistage axial compressor was also revealed. The results fully prove that the model has bright prospects of application in the field of inlet distortion.