中文摘要：

轴流压缩机中的时序（Clocking）效应已通过实验和数值模拟被证实存在，而离心压缩机中时序效应的研究还很少见报道。本文通过实验，研究了静叶间时序效应对压缩机性能的影响，并采用热膜传感器，测量了叶轮出口和扩压器进口流场。实验表明，Clocking效应对压缩机效率影响明显，影响幅值超过2％，最大达到3．6％，对压比也有相应的影响。不同Clocking位置，叶轮出口切向集平均速度改变达3．3％，径向达16．5％；对扩压器进口切向集平均速度的影响超过2％，径向达4％，且扩压器进口流动角改变1．5°。

英文摘要：

The Clocking phenomenon has been detected in the axial compressor by experimental and numerical investigation, but have very few report on the centrifugal compressors. The current study presents the experimental result of stator Clocking effect in low-speed centrifugal compressor. An experimental research program has been performed to study the performance variations associated with airfoil Clocking. And the flow fields have been measured with hot-wire probes at the impeller outlet and the diffuse inlet. The results demonstrate that Clocking effects on the efficiency are obvious. The airfoils Clocking effect on the stage efficiency is more than 2% and the maximum is about 3.6%. At different Clocking positions, the ensemble-averaged velocity components change 3.3% in the tangential direction and 16.5% in the radial direction at the impeller outlet. At the diffuse inlet, the changes exceed 2% in the tangential direction and 4% in the radial direction. And the absolute flow angle alters about 1.5 degree at the diffuse inlet.