实际气体R134a在离心叶轮内部流动的数值研究  

NUMERICAL STUDY ON REAL GAS R134a FLOW IN CENTRIFUGAL IMPELLER

作　　者：刘帆[1] 张楚华[1] 王宝潼[1] 席光[1] 

机构地区：[1]西安交通大学流体机械及压缩机国家工程研究中心,陕西西安710049

出　　处：《工程热物理学报》2007年第z1期136-138,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.10572113);国家高技术研究发展计划资助项目(No.2006010522041);教育部新世纪优秀人才支持计划资助项目(No.NCET-06)

摘　　要：使用实际气体模型对R134a在半开式离心压缩机叶轮内部三维湍流进行了数值计算,比较了比容比相等情况下实际及理想气体模型对压缩过程的差异。研究表明二者设计流量系数基本相等,但实际气体的多变效率低于相应的理想气体计算值;数值计算能够较好地预测实际气体的流动结构和性能参数的变化规律,对实际气体制冷压缩机气动热力设计具有理论及工程意义。Three dimensional turbulent R134a gas flow in an unshrouded centrifugal compressor impeller is numerically simulated using real gas model.The compression process difference between real and perfect gas model is also compared in the case of equal specific volume ratio.The result shows that the design flow coefficients approach each other,while the polytropic efficiency for the real gas is lower than that for the perfect one.Meanwhile,the numerical simulation can predict well the development of flow pattern and performance parameters as the flow rate varies.The numerical results are of theoretical and engineering significance for the aerodynamic and thermodynamic design of real gas refrigeration turbo-compressor.

关 键 词：实际气体 R134A 离心压缩机 状态方程 比容比 

分 类 号：O357.1[理学—流体力学]