多级轴流压气机一维性能预测程序开发及应用

Development and Application of One-dimensional Performance Prediction Program for Multistage Axial Compressor

为了实现对轴流压气机气动性能的准确预测,基于平均流线法建立了多级轴流压气机一维气动性能预测方法,编制了相应的Matlab程序,该方法允许针对不同类型压气机选择适用的经验模型。通过计算得到了某四级亚音速轴流压气机和某八级高速轴流压气机的气动性能,对比分析发现,一维性能预测结果与实验/三维CFD模拟结果吻合较好,效率与压比计算偏差均保持在较小范围内,预测结果精度较高。为进一步提高压气机气动性能预测的准确性,发展了一种经验模型自动校准方法,采用该方法对选取的四级亚音速轴流压气机和八级高速轴流压气机模型进行校准,校准后对各转速下气动性能的预测精度均有所提高。研究工作表明,所建立的多级轴流压气机一维气动性能预测方法以及模型自动校准方法具有一定的准确性和可靠性。

In order to achieve an accurate prediction of the aerodynamic performance of an axial flow compressor,a one-dimensional aerodynamic performance prediction method for multistage axial flow compressor based on the mean streamline method was established,and the corresponding Matlab procedures were programmed.For different types of compressor,the suitable empirical models can be selected by this method.The aerodynamic performances of a four-stage subsonic axial flow compressor and an eight-stage high-speed axial flow compressor were calculated.The comparative analysis indicated the one-dimensional performance prediction results were in good agreement with the experimental and three-dimensional CFD simulation results,the calculation deviations of efficiency and pressure ratio were kept within a small range,and the prediction results were with high accuracy.In order to further improve the prediction accuracy of compressor aerodynamic performance,an automatic calibration method for empirical model was developed.The selected empirical models of a four-stage subsonic axial flow compressor and an eight-stage high-speed axial flow compressor were calibrated by this method.And the prediction accuracies of aerodynamic performance under different speeds were improved after calibration.The research results show that the one-dimensional aerodynamic performance prediction method and the automatic model calibration method for multistage axial compressor are accurate and reliable.