| 低比转数双吸离心泵回流问题的CFD研究 |
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| 引用本文： | 朱荣生,欧鸣雄.低比转数双吸离心泵回流问题的CFD研究[J].农业机械学报,2009,40(4). |
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| 作者姓名： | 朱荣生 欧鸣雄 |
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| 作者单位： | 1. 江苏大学流体机械工程技术研究中心,镇江,212013
2. 江苏特种化工泵工程技术研究中心,靖江,214537 |
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| 基金项目： | 江苏省科技攻关重大项目 |
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| 摘 要： | 针对某低比转数双吸离心泵在小流量工况下出现回流的问题,利用CFD技术对双吸泵及吸水室内部流场进行数值模拟研究,并提出定点速度值分析法,模拟流场测试试验中采用的动态探针采样测试系统,对回流问题进行研究.通过对叶轮进口相应测试点在不同流量下的速度变化进行统计分析,发现其变化规律和理论分析结果与以往文献中试验总结的规律变化一致.并根据曲线变化及理论分析结果,提出回流诱发流量点、回流稳定流量点、回流变化区间的概念.并在理论分析基础上,提出叶轮进口回流区有效厚度值的定义及预估方法.
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| 关 键 词： | 双吸离心泵 回流 流场测试 探针 模拟 |
Simulation of Reverse Flow in Low Specific Speed Double Suction Centrifugal Pump |
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| Zhu Rongsheng,Ou Mingxiong.Simulation of Reverse Flow in Low Specific Speed Double Suction Centrifugal Pump[J].Transactions of the Chinese Society of Agricultural Machinery,2009,40(4). |
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| Authors: | Zhu Rongsheng Ou Mingxiong |
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| Institution: | 1.Technical and Research Center of Fluid Machinery Engineering;Jiangsu University;Zhenjiang 212013;China 2.Technical and Research Center of Special Chemical Pump Engineering;Jingjiang 214537;China |
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| Abstract: | Aiming at the problem of reverse flow which occurred under low flow rate in a low specific speed double suction centrifugal pump,the inner flow of pump and suction chambers were simulated,velocity analysis of fixed-points which was proposed to simulate probe-sampling system in experiment was used in reverse-flow research.After the statistics and analysis of velocity changes of fixed-point in the inlet of impeller in different flow rates,it was found that the curve got from simulation accord with the theory ... |
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| Keywords: | Double suction centrifugal pump Reverse flow Flow-field test Probe Simulation |
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