Numerical Analysis of Axial-Flow Compressor Performance under Inlet Total Temperature Distortion

This paper selects a single-stage axial compressor test rig from Northwestern Polytechnical University as the research object to investigate the dynamic response of an axial compressor's performance under total temperature distortion conditions. Two numerical simulation methods, the frozen rotor method and the unsteady calculation method, are employed to conduct a detailed analysis of the performance characteristics and internal flow field details of the compressor under various operating conditions, including large flow rate, peak efficiency, and near-stall conditions. By comparing the flow field characteristics under different inlet temperatures and operating conditions, this study delves into the mechanism of the impact of total temperature distortion on the performance of the axial compressor. Furthermore, the parallel compressor theory model is used to predict the performance characteristic curves under distorted conditions. It is found that the predicted values of this model show higher agreement with the unsteady calculation results, especially at the near-stall operating point, compared to the frozen rotor method, thus verifying the effectiveness and accuracy of this theoretical model under complex operating conditions.