离心压气机蜗壳非轴对称几何结构诱发静压周向非均匀分布,蜗壳静压的逆向传播对上游流场产生影响。本文采用数值方法对不同流量下蜗壳静压的逆向传播特性进行研究。结果表明:蜗壳高静压通过叶轮槽道向上游传播,造成叶轮内部流场静压的变化,使叶轮各槽道的流量产生差异,也使相应槽道对应的叶轮进口气流角明显增大。 Centrifugal compressor scroll case non-axisymmetric geometry induces a circumferentially non-uniform distribution of static pressure, and the reverse propagation of the hydrostatic pressure exerts an influence on the upstream flow field. In this paper, the numerical method is used to study the reverse propagation of the volute static pressure under different flow rates. The results show that the high static pressure of the volute propagates upstream through the impeller channel, resulting in the change of the static pressure in the impeller, resulting in the difference in the flow rate between the impellers and the impeller inlet airflow angle corresponding to the corresponding channel .