车用涡旋压缩机多工况瞬态流场分析

Transient Flow Field Analysis of Vehicle Scroll Compressor under Multi Working Conditions

涡旋压缩机由于其高效率、低噪音和振动等优点成为近期制冷领域研究的热点。涡旋压缩机的工作过程是一个三维非恒定可压缩的粘性流动过程。为了优化压缩机的设计,使其具有更好的性能,有必要深入了解涡旋压缩机内部不稳定流动的详细机理。本文建立了涡旋压缩机的三维流场模型。采用动网格技术和用户自定义文件相结合的方式实现流场的非定常瞬态模拟。最后得到了涡旋压缩机在不同转速和不同排气压力情况下的温度和压力分布情况。

Due to its high efficiency,low noise and vibration,scroll compressor has become a research hotspot in the field of refrigeration. The working process of scroll compressor is a three-dimensional,unsteady and compressible viscous flow process. In order to optimize the design of the compressor and make it have better performance,it is necessary to understand the detailed mechanism of internal unsteady flow in scroll compressor. In this paper,a three-dimensional flow field model of scroll compressor is established. The unsteady transient simulation of flow field is realized by the combination of dynamic mesh technology and user-defined file. Finally,the temperature and pressure distribution of the scroll compressor at different speeds and discharge pressures are obtained.