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基于计算流体力学(CFD)方法并采用动网格技术建立了滚动转子压缩机的数值分析模型,模拟循环的结果符合理论工作循环。经与试验对比验证模拟的容积效率和指示效率准确可靠,模拟的载荷变化为动载荷下机械损失的研究和评价提供了依据。对流场的分析表明气液分离器内的压力变化主要集中在排气弯管内,压力波动过程中存在气体动能和势能的相互转化,设计改进应以减少能量转化过程中的损失为目标。
The numerical analysis model of the rolling rotor compressor is established based on Computational Fluid Dynamics (CFD) method and the moving grid technique. The results of the simulation cycle accord with the theoretical working cycle. The volumetric efficiency and indicating efficiency of the simulation are verified by comparison with the test. The simulated load changes provide the basis for the research and evaluation of the mechanical loss under dynamic load. The analysis of the flow field shows that the pressure changes in the gas-liquid separator are mainly concentrated in the exhaust elbow. The mutual conversion of gas kinetic energy and potential energy exists during the pressure fluctuation, and the design improvement should aim at reducing the loss in the energy conversion process.