中文摘要：

为研究流体机械内部伴有盐析的液固两相流动情况，自行设计了旋流式模型泵，采用双流体模型计算了该泵在最优工况下的氯化钠盐析两相流场，并采用先进的激光相位多普勒粒子测速仪测量了泵无叶腔及叶轮内部盐析两相流的三维速度场。将试验结果与计算结果进行对比，验证了计算模型的适用性，并给出了误差分析。通过对试验测得的周向、轴向、径向速度及其对应的脉动速度分布曲线讨论，初步揭示了该型泵内盐析两相流动特征。在整个流道内，盐析晶体颗粒大部分集中于无叶腔，且分布较均匀；进入叶轮后向叶片工作面靠拢；颗粒浓度最低处是在叶轮进口叶片背面靠近叶轮后盖板附近；液固两相在叶轮与无叶腔中的周向速度分布差异明显；两相间速度及脉动速度有滑移，但差异总体上并不显著。

英文摘要：

In order to study liquid-solid two-phase flow field with salt-out in impeller machines, a vortex model pump is designed. Two-fluid model is adopted to simulate the two-phase flow field with salt-out of sodium chloride under the optimum operating condition of the pump. Phase Doppler particle anemometer is used to measure 3D velocity field of the two-phase flow in volute and impeller of the pump. Experimental results are compared with the calculated to validate the applicability of calculation model. And error analysis is also given. Characteristics of the two-phase flow with salt-out in the model pump are revealed initially by discussing on distributions of circumferential, axial and radial velocities and relative fluctuated velocities obtained by experiments. Most of salt-out particles distribute in volute uniformly in the whole flow passage. The granules flow to pressure side in impeller. Particle concentration is the lowest near rear plate of suction side at the inlet of impeller. Distributing of circumferential velocity of liquid and solid phases in impeller is obviously different from that in volute. Velocity slide between two phases is small.