Using the idea of inlet distortion parallel compressor theory dividing the compressor into some sub compressors

the partial casing treatment compressor was divided into casing treatment sub compressor and solid wall sub compressor. Then the outlet parameter of the partial casing treatment compressor was got according to the laws of momentum conservation and energy conservation

and the assumption of partial casing treatment performance prediction model was acquired based on the experimental conclusions of linear relationship between the mass flow of stall margin point and the casing treatment circumferential angle. Comparisons of the prediction results and the experimental results reveal that the curves of prediction characteristics and experimental characteristics are consistent in overall trend. Under supersonic condition at 98% design rotating speed

the peak efficiency prediction error is smaller than 0.5%

and the comprehensive margin prediction error is under 0.6%.