往复式制冷压缩机气缸内流场特性仿真分析

Simulation Analysis on Flow Field Characteristics of Reciprocating Compressor in Cylinder

往复式压缩机是依靠曲柄的旋转带动活塞的往复运动,通过改变工作容积,来实现提高气体压力的目的。通过建立往复式制冷压缩机气缸的三维模型,利用CFD仿真软件实现对气缸工作过程的数值模拟,分析气缸内流场特性包括压力、速度等参数随曲柄转角的变化情况,为优化压缩机性能提供了依据。

Reciprocating compressors rely on the rotation of the crank to drive the reciprocating motion of the piston and achieve the purpose of increasing gas pressure by changing the working volume.In this paper,the three-dimensional model of the compressor cylinder is set up,and the dynamic grid parameters in the CFD simulation software are set up to realize the numerical simulation of the working process of the cylinder.The characteristics of the gas flow field in the cylinder are analyzed,including the variation of temperature,pressure and speed with the crank angle.The theoretical basis is proposed to optimize the performance of the compressor.