中文摘要：

本文实验研究不同轴向间隙、不同静叶时序角度对某低速轴流压气机出口流场的影响。结果表明,当一级静叶尾迹位于二级静叶流道中央位置时对应压气机最低效率状态;一级静叶尾迹重合或接近于二级静叶尾迹时对应压气机最高效率状态。随着轴向间隙的减小,压气机的扩压能力逐渐增强,通流能力下降。此外,设计工况下压气机输入功率也随轴向间隙的减小而增大。综合考虑轴向间隙对压气机扩压能力、通流能力及输入功率的影响,推测存在一个最佳轴向间隙,使得各项因素达到最优匹配,实现压气机的最佳性能。

英文摘要：

The experimental investigation of stator clocking with different axial gaps shows that the minimum efficiency occurs when the upstream stator wake locates in the middle of the downstream stator flow passage. The maximum efficiency is obtained when the upstream stator wake mixes with the downstream stator wake. As the axial gap reduces, the diffusion ability of the compressor increases but the through-flow ability decreases, while the input power also increases. In consideration of the combined effects resulted from these three performance parameters, an optimum axial gap should exist to make the compressor get the best performance.