采用流线曲率法对一台三级轴流压气机在三种不同出口流道情况下的流场进行了分析，在变工况计算中还以设计点数据为依据应用了“流场诊断”技术。分析表明，压气机的外特性——压比和效率随流量的变化关系及喘振边界——受到了下游部件结构比较严重的影响，内部流场所受的影响在末级叶片上特别显著。这可归结为出口流场径向畸变的影响。从本质上看，它比入口流场畸变问题更难解决。 The flow field curvature method was used to analyze the flow field of a three-stage axial compressor under three different outlet flow paths. In the calculation of variable working conditions, “flow field diagnosis” was also applied on the basis of design point data. technology. The analysis shows that the external characteristics of the compressor - pressure ratio and efficiency change with the flow rate and the surge boundary - are more affected by the structure of the downstream components, and the influence of the internal flow field is particularly significant on the final blade. This can be attributed to the radial flow field exit distortion. In essence, it is more difficult to solve than the distortions in the inlet flow field.