| 混合沙粒对半开式叶轮离心泵磨损的影响 |
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| 引用本文： | 王勇,李刚祥,袁霄,张国翔,吴璞,刘厚林.混合沙粒对半开式叶轮离心泵磨损的影响[J].排灌机械工程学报,2021,39(8):764-769. |
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| 作者姓名： | 王勇 李刚祥 袁霄 张国翔 吴璞 刘厚林 |
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| 作者单位： | 1. 江苏大学国家水泵及系统工程技术研究中心, 江苏 镇江 212000; 2. 江苏振华海科装备科技股份有限公司, 江苏 泰州 225500 |
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| 摘 要： | 为了研究含有混合多种颗粒粒径的含沙水对离心泵过流部件磨损特性的影响,应用RNG k-ε湍流模型和SIMPLEC算法,基于颗粒离散相模型(DPM)和半经验的McLaury磨损模型,沙粒注入选用Rosin-Rammler分布的拟合方法,对一台半开式离心泵内固液两相流的磨损特性进行数值分析.研究结果表明:叶轮流道内沙粒组分中大颗粒有趋向叶片吸力面运动的趋势,当混合沙粒的粒径较小时,蜗壳内沙粒运动较为均匀,粒径越大,沙粒运动越贴近蜗壳壁面;不同粒径组分的沙粒在叶轮的压力面、吸力面和后盖板壁面上的平均停留时间分布相似,颗粒粒径越大,平均停留时间越小;在蜗壳壁面上沙粒组分中粒径不大于700 μm的沙粒平均停留时间分布规律与沙粒在叶轮过流壁面上的平均停留时间类似,大于700 μm的沙粒平均停留时间会随着粒径增加而增大;随着沙粒组分中大粒径沙粒的增加,叶片压力面的磨损强度逐渐减弱,叶片吸力面、后盖板和蜗壳的磨损强度逐渐增强.
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| 关 键 词： | 半开式叶轮离心泵 固液两相流 颗粒混合 离散相模型 磨损 |
| 收稿时间： | 2020-08-12 |
Influence of mixed sand on wear of centrifugal pump with semi-open impeller |
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| WANG Yong,LI Gangxiang,YUAN Xiao,ZHANG Guoxiang,Wu Pu,LIU Houlin.Influence of mixed sand on wear of centrifugal pump with semi-open impeller[J].Journal of Drainage and Irrigation Machinery Engineering,2021,39(8):764-769. |
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| Authors: | WANG Yong LI Gangxiang YUAN Xiao ZHANG Guoxiang Wu Pu LIU Houlin |
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| Institution: | 1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212000, China; 2. Jiangsu Zhenhua Pump Industry Co., Ltd., Taizhou, Jiangsu 225500, China |
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| Abstract: | In order to study the influence of sand-bearing water with mixed particle sizes on the wear characteristics of centrifugal pump components, using RNG k-ε turbulence model and SIMPLEC algorithm, based on particle discrete phase model(DPM)and semi-empirical McLaury erosion model, the Rosin-Rammler distribution fitting method was used for sand injection, and wear characteristics of solid-liquid two-phase flow in a semi-open centrifugal pump were numerically analyzed. The results show that the large particles in the impeller passage tend to move towards the suction surface of the blade. When the particle size of the mixed sand is small, the movement of the sand particles in the volute is more uniform. The larger the particle size is, the closer the movement of the sand particles is to the volute wall. The average residence time distribution of sand particles with different particle sizes is similar on the pressure surface, suction surface and back shroud. The larger the particle size is, the smaller the average residence time is. The distribution of the mean residence time of the sand particles with particle size not more than 700 μm on the volute wall was similar to that of the sand particles on the impeller′s flow wall. The mean residence time of the sand particles with particle size greater than 700 μm increased with the increase of the particle size. With the increase of the large particle size of the sand component, the wear strength of the pressure surface of the blade decreases gradually, while that of the suction surface of the blade, the back shroud and the volute increases gradually. |
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| Keywords: | semi-open impeller centrifugal pump solid-liquid two-phase flow particle mixing discrete phase model wear |
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