【摘要】 建立了小流量离心式制冷压缩机内部流动的三维数学模型，并用Krain离心式压气机的实验数据对该模型进行了验证。采用ANSYS CFX软件，调用真实气体模型并读取R134a物性参数，对小流量离心式制冷压缩机内部流动进行了数值模拟。分析了进口叶片角、出口叶片角、相对分流叶片长度等结构参数对压缩机气动性能的影响规律及其内在原因。根据数值分析结果对基于一元流方法设计的原型压缩机结构进行了改进，使其压比提高了使其压比提高了2.68%、等熵效率提高了2.17%。更多还原

【Abstract】 A three-dimensional mathematical model for the internal flow of small flow centrifugal refrigeration compressor was established, and the model was verified by the experimental data of Krain centrifugal compressor. ANSYS CFX software was used to call the real gas model and read the physical parameters of R134a to numerically simulate the internal flow of small flow centrifugal refrigeration compressor. The influence of structural parameters such as inlet blade angle, outlet blade angle and relative splitter blade length on the aerodynamic performance of the compressor and its internal reasons are analyzed. According to the results of numerical analysis, the structure of prototype compressor based on unitary flow method is improved, the pressure ratio is increased by 2.68 % and the isentropic efficiency is increased by 2.17 %.更多还原