为了降低径向进气室对压气机通流性能的影响，通过三维数值仿真对进气室的设计参数进行了研究。首先，量化评价了不同的进气室平直段子午型线对压气机进气均匀性的影响，然后对进气室支板与平直段支撑筋之间的相对角度进行了研究。研究结果表明：压气机的通流裕度对进气室平直段的型线较为敏感，需要谨慎修型以确保通流性能不会衰减；进气室平直段型线的改型主要诱发压气机进口径向叶尖的旋流畸变；而进气室支板与平直段支撑筋之间相对角度的改变对压气机进口的周向叶根畸变略有影响，支板与支撑筋重合会导致进气室的压损增加，压气机的喘振裕度略有下降，建议支板与支撑筋错开一定角度。

In order to reduce the impact of radial intake chamber on the aeroperformance of the compressor, the design parameters of the intake chamber were studied by threedimensional numerical simulation. Firstly, the influence of different meridian profiles of the intake chamber straight section on the compressor intake uniformity was quantified, then the relative angle between the diaphragm in the intake chamber and the struts in the intake chamber straight section was studied. The results show that the surge margin of the compressor is sensitive to the profile of the intake chamber straight section, so it is necessary to carefully modify the profile to ensure that the aeroperformance will not decrease. The profile modification of the intake chamber straight section mainly induces the swirl distortion of the radial tip at the compressor inlet. And the change of relative angle between the diaphragm in the intake chamber and the struts in the intake chamber straight section has a slight influence on the circumferential blade root distortion. The overlap between the diaphragm and the struts will make the pressure loss of the intake chamber increase, and the surge margin of the compressor decrease slightly. Therefore, it is suggested that the design of the struts should keep a certain deflection angle from the diaphragm.

TH453

中国博士后科学基金（2020M671672）