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Numerical Simulation and Experimental Research on the Influence of Solid-phase Characteristics on Centrifugal Pump Performance

查看全文 作　　者：LI [1]Yi;ZHU [1]Zuchao;HE [2]Weiqiang;HE [3]Zhaohui 高影响力作者 机构地区：[1]Laboratory of Fluid Transmission and Application, Zhejiang Sci-Tech University, Hangzhou 310018, China;[2]Hangzhou Dalu Industry Co., Ltd, Hangzhou 311234, China;[3]Zhejiang Institute of Mechanical & Electrical Engineering Co., Ltd, Hangzhou 310002, China高影响力机构 出　　处：《Chinese Journal of Mechanical Engineering》索引2012年第25卷第6期,共6页高影响力期刊 基　　金：supported by National Natural Science Foundation of China(Grant No. 51076144);Zhejiang Provincial Key Science Foundation of China(Grant No. 2009C13006) 摘　　要：The law governing the movement of particles in the centrifugal pump channel is complicated; thus, it is difficult to examine the solid-liquid two-phase turbulent flow in the pump. Consequently, the solid-liquid two-phase pump is designed based only on the unary theory. However, the obvious variety of centrifugal-pump internal flow appears because of the existence of solid phase, thus changing pump performance. Therefore, it is necessary to establish the flow characteristics of the solid-liquid two-phase pump. In the current paper, two-phase numerical simulation and centrifugal pump performance tests are carried out using different solid-particle diameters and two-phase mixture concentration conditions. Inner flow features are revealed by comparing the simulated and experimental results. The comparing results indicate that the influence of the solid-phase characteristics on centrifugal-pump performance is small when the flow rate is low, specifically when it is less than 2 m3/h. The maximum efficiency declines, and the best efficiency point tends toward the low flow-rate direction along with increasing solid-particle diameter and volume fraction, leading to reduced pump steady efficient range. The variation tendency of the pump head is basically consistent with that of the efficiency. The efficiency and head values of the two-phase mixture transportation are even larger than those of pure-water transportation under smaller particle diameter and volume fraction conditions at the low-flow-rate region. The change of the particle volume fraction has a greater effect on the pump performance than the change in the particle diameter. The experimental values are totally smaller than the simulated values. This research provides the theoretical foundation for the optimal design of centrifugal pump. 关 键 词：数值模拟 泵性能 离心泵 实验值 相特性 颗粒体积分数 两相混合物 固体颗粒
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