Abstract：The effects of impeller outlet width on pressure pulsation in two side chambers of a centrifugal pump are studied based on the mutual authentication between experiment and numerical simulation. The pump performance curves are measured and predicted with CFD simulation at different impeller outlet widths, the fluid static pressure and pressure pulsation as well as pulsation amplitude distributions in both side chambers are obtained and analyzed comparatively across the different width cases. The predicted performance curves are in good agreement with the experimental data. It is turned out that the static pressure and pressure pulsation in the front side chamber ascend with the enlarging outlet width and reducing radius. However, there is no significant change in them with variable outlet width and radius in the rear side chamber. Based on a compromise between pump performance and pressure pulsation in the chambers and volute, the ratio of the impeller outlet width to the impeller diameter should be less than 0.06 at the specific speed ns=97. In order to make the pressure pulsations effectively decayed in the side chambers, the best ratio of the impeller outlet width to the gap of the front side chamber should be in the vicinity of 1.81. The results can be used to guide the optimal design of the impeller of centrifugal pumps.
戴菡葳, 刘厚林, 丁剑, 谈明高, 王勇. 离心泵叶轮出口宽度对泵腔内压力脉动分布的影响[J]. 排灌机械工程学报, 2015, 33(1): 20-25.
Dai Hanwei, Liu Houlin, Ding Jian, Tan Minggao, Wang Yong. Effects of impeller outlet width on pressure pulsation in two side chambers of centrifugal pump. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(1): 20-25.
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