苗 会，张 翼，王 强，乔林虎

1:中北大学机械与动力工程学院

2:大秦铁路股份有限公司

    摘 要：本文采用ANSYS-CFX对压气机进行三维流动数值模拟，获得了采用蜗壳冷却技术和不采用冷却技术两种情况下的压力和温度的三维流场分布情况，分析了蜗壳冷却技术对压气机流场的影响。结果表明，模拟计算结果与原机试验所测得的结果基本吻合，采用蜗壳冷却技术可以降低压气机出口空气的温度，增大出口空气的压力，进而提高增压器的充气密度，改善了增压器的性能，并为压气机蜗壳冷却技术的优化和改进提供参考。

    关键词：增压器；压气机；蜗壳冷却；数值模拟

    Abstract: The three dimensional flow numerical of compressor is simulate d using ANSYS-CFX software, and obtain the distribution of the pressure and temperature of the three dimensional flow field under the conditions of adopting volute cooling technology and adopting no volute cooling technology. The effect of volute cooling technology on the compressor flow field is analyzed at the same time. Results show that the simulation results are basically consistent with the original machine test results. The using of the cooling technology can reduce the outlet air temperature of the compressor, increase the air outlet pressure thereby increase the pneumatic density of the supercharger, improve the performance of the supercharger, and can provide a reference for the optimization and improvement of the compressor volute cooling technology..

    Key words: turbocharger; compressor; volute cooling; numerical simulation