【摘要】 工质泵是泵驱动两相回路的关键驱动部件,在整个系统中起着决定性的作用。为研究工质泵的内部工作特性,建立旋涡泵三维模型并提取流体域,对基于制冷剂R22的旋涡泵的工作过程进行模拟。研究结果表明:进口压力从0.95MPa增至1.25MPa,到达稳态的迭代次数缩减一半以上,最大总体积分数从0.6降至0.007;旋涡泵稳态运行时,叶轮受到的离心力作用使叶轮外边缘处总压力分布大于叶轮内边缘处约0.1MPa。叶轮汽蚀破坏区域位于泵进出口叶轮内边缘,此处是泵内叶轮待改进设计的区域。更多还原

【Abstract】 The working fluid pump as the key driving component of a pump driven two-phase loop plays a crucial role for the system. In order to study the internal working characteristics of working fluid pump, a three-dimensional model of vortex pump was established and the fluid region was extracted. The working process of vortex pump was simulated based on R22 refrigerant.The results show that the steady state iterations reduces over a half and the maximum total volume fraction decreases from 0.6 to0.007 when the inlet pressure increases from 0.95 MPa to 1.25 MPa. During the steady operation of the vortex pump the total pressure distribution at the outer edge of the impeller caused by the centrifugal force on the impeller was 0.1 MPa greater than that at the inner edge of the impeller. The impeller cavitation damage area is located on the inner edge of the pump inlet and outlet impeller, which is the area to be improved.更多还原