中文摘要：

为研究跨声压气机叶尖间隙流动对性能影响的特征，数值计算了某高负荷跨声风扇转子在5种等高间隙和两种阶梯间隙结构下的性能．通过对总体性能参数和叶尖区静压、周向速度、熵等细节参数的分析，认为叶尖前段间隙流比后段间隙流对压气机性能的影响更大．其中，涡波干涉对于前段间隙流带来的危害尤为重要．比较阶梯间隙的计算结果，验证了这一推断．

英文摘要：

In order to study the influence of tip clearance flow on the performance of a transonic compressor,a high-load transonic fan＇s rotor with five constant width clearances and two step-clearances were numerically simulated. After analysis of the overall performance parameters and the detailed flow parameters including the static pressure, circumferential velocity and entropy,it is concluded that the front part clearance flow has greater influence on the compressor than the back part clearance flow. In particular, the vortex-shock interference may worsen the front part clearance flow, as demonstrated by comparing the simulation of two step-clearances.