叶片式气液多相混输泵应同时兼备泵与压缩机两种流体机械的性能，因此在设计上有相当的难度，探索性很强。目前国内关于该领域的研究才处于刚刚起步的阶段。本文报导了清华大学近年在叶片式气液混输泵方面的相关试验研究成果。结果表明，目前的研发成果可以满足一定气体含量的气液混输要求。

A combined approach of inverse method and direct flow analysis is presented for the hydrodynamic design of gas-liquid two-phase flow rotodynamic pump impeller. The geometry of impeller blades is designed for a specified velocity torque distribution by treating the two-phase mixture as a homogeneous fluid under the design condition. The three-dimensional flow in the designed impeller is verified by direct turbulent flow analysis, and the design specification is further modified to optimize the flow distribution. A helical axial pump of high specific speed has been developed. To obtain a favorable pressure distribution the impeller blade was back-loaded at the hub side compared to the tip side. Experimental results demonstrate that the designed pump works in a wide flow rate range until the gas volume fraction increases to over 50% and its optimum hydraulic efficiency reaches to 44.0% when the gas volume fraction of two-phase flow is about 15.6%. The validity of design computation has been proved.

The performance characteristics of an axial-flow pump with tandem blades are studied based on the numerical computations. The arrangement of the pump impellers is established through the analysis of velocity triangles. With the commercial computational fluid dynamics (CFD) software NUMECA, the turbulent flow in the tandem axial-flow pump is simulated in various flow conditions. The detail flow structure in the leading edge region of the rear impeller is described, and the influence of the deflection angle of the rear blade on the head performance is studied. According to the simulation, the performance comparison is made between the tandem axial-flow pump and the conventional two-stage axial-flow pump with a uniform impeller size. Results of the study indicate that the tandem axial-flow pump can work in a wider range with high efficiency.

基于正反问题迭代，提出了叶片式气液混输泵叶轮水力设计的方法。叶轮叶片的初始几何形状根据给定的速度矩分布规律进行设计，通过叶轮内CFD三维流场分析结果，改进流道参数和速度矩分布规律以优化叶片几何参数和流场分布。外特性试验结果表明，设计叶轮可在较宽的流量范围及含气量范围下工作，最优工况效率可达44.0%，且能在短时间内输送100%的气体而不发生气堵现象，证明了该设计方法的有效性和可靠性。

基于双流体模型建立针对叶片泵内气液两相三维湍流流动的数学模型和数值计算方法。相间作用力考虑了阻力和附加质量力，湍流模型考虑了因相含量脉动引起的附加源项，在SIMPLEC算法基础上提出了一种气液两相流的压力修正算法。运用所建模型计算了叶片式气液混输泵在进口含气率分别为5%，15%，25%的系列工况下叶轮的内部两相流场，并作了扬程特性预测。与实验结果的对比表明，所提出的流动模型是可靠的，并具有较宽的进口含气率适用范围。