| 低比转速离心泵空化性能的数值模拟 |
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| 引用本文： | 典平鸽.低比转速离心泵空化性能的数值模拟[J].水利水电科技进展,2011,31(6):31-34. |
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| 作者姓名： | 典平鸽 |
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| 作者单位： | 河南城建学院环境与市政工程系,河南平顶山,467001 |
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| 基金项目： | “十一五”国家科技支撑计划(2008BAF34B10) |
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| 摘 要： | 为了对低比转速离心泵空化发生时的内部气液两相流动进行分析,应用计算流体力学(CFD)软件对比转速为66的离心泵空化性能进行气液两相流场的数值研究。对不同有效空化余量时叶轮内部气泡分布的研究表明,泵在进口压力较高时就已经在叶片的进口背面产生空化初生,临界空化余量和许用空化余量时,气泡在叶片表面和流道内部均有分布,占据了部分叶轮流道,影响叶轮内部能量交换,并可能对泵造成空蚀。对该实型泵进行试验研究,验证了数值计算的精确度。
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| 关 键 词： | 离心泵 空化初生 临界空化余量 允许空化余量 |
| 修稿时间： | 2011/12/21 0:00:00 |
Numerical simulation of cavitation characteristics of low specific speed centrifugal pump |
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| DIAN Ping-ge.Numerical simulation of cavitation characteristics of low specific speed centrifugal pump[J].Advances in Science and Technology of Water Resources,2011,31(6):31-34. |
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| Authors: | DIAN Ping-ge |
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| Affiliation: | DIAN Ping-ge (Faculty of Environmental & Municipal Engineering,Henan University of Urban Construction,Pingdingshan 467001,China) |
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| Abstract: | In order to analyze the vapor-liquid two-phase flows in low specific speed centrifugal pumps at the occurrence of cavitation,numerical simulation of the vapor-liquid two-phase flow fields in a centrifugal pump at a specific speed of 66 was carried out by use of computational fluid dynamics software.The distribution of water vapor within the impeller at different net positive suction heads was investigated.Cavitation inception occurred at the inlet of blade suction side was found when the inlet pressure is q... |
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| Keywords: | centrifugal pump cavitation inception critical net positive suction head allowable net positive suction head |
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