叶片式混输泵气液两相流及性能的数值分析  

Numerical Analysis of Gas-Liquid Two-Phase Flow in Multiphase Rotodynamic Pump and Pump Performance

作　　者：黄思[1] 王宏君[1] 郑茂溪[1] 

机构地区：[1]华南理工大学工业装备与控制工程学院

出　　处：《华南理工大学学报（自然科学版）》2007年第12期11-16,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：华南理工大学回国人员科研启动基金项目(K7050040)

摘　　要：利用Fluent计算软件在多重参考坐标系下采用欧拉方法的双流体湍流模型计算螺旋轴流式叶片泵内高含气状态下的三维气液两相流场.通过对泵内绝对流速、叶轮相对流速、静态压力、气液两相分布及其相间滑移速度矢量的分析,探讨了气液两相介质在泵内的流动规律.结果显示离心力的作用使叶轮内液相主要在轮缘附近流动,而气相则聚集在轮毂附近;泵导叶内气液两相分离状况有较明显改善.通过与泵性能实验结果对比,验证了文中方法对气液两相叶片式混输泵计算分析的有效性.A three-dimension gas-liquid two-phase flow with a high gas volumetric ratio in a helico-axial multiphase rotodynamic pump is numerically simulated using the Fluent software. In the simulation, the Euler model of a twophase turbulent flow in a multiple reference frame is adopted. The rule and mechanism of the two-phase turbulent flow in the pump are then investigated by analyzing the absolute velocity in the pump, the relative velocity in the impeller, the static pressure, the distribution of gas and liquid phases, and the slip velocity between two phases. The results indicate that the liquid phase in the impeller mainly flows near the flange while the gas phase mainly near the hub due to the existence of centrifugal force, and that the two-phase separation in the diffuser obviously improves. The comparison of the predicted results with the experimental ones demonstrates that the proposed method is effective in the computation and analysis of the gas-liquid two-phase rotodynamic pump.

关 键 词：气液两相叶片式混输泵 数值模拟 两相流场 性能预测 

分 类 号：TQ051.21[化学工程]