Hydrodynamic design of rotodynamic pump impeller for multiphase pumping by combined approach of inverse design and CFD analysis
Hydrodynamic design of rotodynamic pump impeller for multiphase pumping by combined approach of inverse design and CFD analysis
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DOI：
10.1115/1.1881697
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发表时间：
2005-03-01
影响因子：
2
通讯作者：
Yu, ZY
中科院分区：
文献类型：
--
作者：
Cao, SL;Peng, GY;Yu, ZY
本文提出了一种气液两相流转子泵叶轮水动力设计的逆解法和正解法相结合的方法。在设计条件下，将两相混合物视为均质流体，按给定的速度转矩分布设计叶轮叶片的几何形状。通过直接湍流分析验证了设计叶轮内的三维流动，并进一步修改了设计规范，优化了流量分配。研制了一种高比转速螺旋轴流泵。为了获得有利的压力分布，与叶尖侧相比，叶轮叶片在轮毂侧背加载。实验结果表明，所设计的泵在较宽的流量范围内工作，直到气体体积分数增加到50%以上，当两相流气体体积分数为15.6%时，其最佳水力效率可达44.0%。验证了设计计算的正确性。
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.