实验研究了一台采用正弯静叶的低速压气机在不同轴向间隙下的时序效应,详细测量了二级静叶出口的横截面流场.实验结果表明:随着轴向间隙的减小,时序效应未见明显变化,压气机扩压能力增强,输入扭矩随之增加,效率则呈现出先增大后减小的趋势,表明存在最佳周向间隙,同时喘振裕度有所下降. The time-series effect of a low-speed compressor with positive curved vanes under different axial clearances is experimentally studied, and the cross-sectional flow field at the outlet of the secondary vane is measured in detail.The experimental results show that with the decrease of the axial clearance , No significant change in timing effects, compressor expansion capability increased, the input torque increases, the efficiency showed the first increase and then decrease, indicating that there is the best circumferential clearance, while the surge margin decreased.