中文摘要：

以建成的双级对转轴流压气机实验台为研究对象，分别应用数值模拟和实验手段对不同转速比和轴向间隙条件下压气机性能和内部流动进行分析研究。研究结果表明：转速比变化对压气机性能参数影响较大，且随转速比的增加压气机效率出现先增后减的变化趋势，当转速比为1．06时对转压气机效率最高，最高效率为87．44％。轴向间隙变化对压气机性能影响较小，在本文研究范围内压气机压比和效率出现不到2％的变化，当轴向间隙为45％转子1轴向弦长时压气机压比最大，轴向间隙为55％轴向弦长时压气机效率最高。

英文摘要：

The performance and detailed flow structure of a counter-rotating compressor under different rotating speed and different axial distance were experimentally and numerically investigated. The results show preliminarily that the performance of contra-rotating compressor changed in a large range with the different rotating speed. The isentropic efficiency increased with the speed ratio, and the peak efficiency was 87.44% at 1.06（the speed ratio）, and it was reduced again with speed ratio increasing. While the total pressure ratio and isentropic efficiency changed in less than 2% when the axial distance augmented from 40% axial chord of rotor 1 to 70%. The peak total pressure ratio appeared at 45% axial chord of rotor 1, while the peak efficiency appeared at 55% axial chord of rotor 1.