蜗壳冷却对增压器压气机性能的影响分析

Analysis on Influence of Volute Cooling on Turbocharger Compressor Performance

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。

The paper uses the ANSYS - CFX software to do the 3 - D flow numerical simulation for the compressor, acquiring the pressure and temperature distributions of the compressor with and without volute cooling technology. The effect of the volute cooling technology on the flow field of the compressor is analyzed at the same time. It is shown that the simulation results are basically consistent with these of the original machine test. The using of the cooling technology can reduce the air outlet temperature of the compressor, raise the air outlet pressure and thereby increase the air density of the supercharger, improving the supercharger performance and providing a reference for the optimization and improvement of the volute cooling technology for the compressor.