排灌机械工程学报
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排灌机械工程学报  2014, Vol. 32 Issue (3): 196-201    DOI: 10.3969/j.issn.1674-8530.13.0152
泵理论与技术 最新目录 | 下期目录 | 过刊浏览 | 高级检索 Previous Articles  |  Next Articles  
多级潜水泵内部压力脉动特性
施卫东1, 徐燕1, 张启华1, 王国涛2, 陆伟刚1, 马栋棋3
1.江苏大学国家水泵及系统工程技术研究中心, 江苏 镇江 212013; 2.江苏省特种设备安全监督检验研究院常州分院, 江苏 常州 213016; 3.福建省机械科学研究院, 福建 福州 350005
Characteristics of pressure pulsation in multi-stage submersible pump
Shi Weidong1, Xu Yan1, Zhang Qihua1, Wang Guotao2, Lu Weigang1, Ma Dongqi3
1.National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Jiangsu Province Special Equipment Safety Supervision Inspection Institute Changzhou Branch, Changzhou, Jiangsu 213016, China; 3.Fujian Academy of Mechanical Sciences, Fuzhou, Fujian 350005, China
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摘要 为研究多级潜水泵的瞬态运行特性,基于Fluent软件,采用标准k-ε湍流模型,SIMPLEC算法,在滑移网格技术的基础上,对两级模型泵进行三维非定常数值模拟.得到了潜水泵的水力性能并与试验进行对比,计算了不同位置处的压力脉动情况,并对其结果进行了时域和频域分析.结果表明:不同位置点处压力脉动均呈现周期性变化,其周期接近叶轮叶片数,频率接近叶频,而导叶叶片数对压力脉动周期影响较小;叶轮内的脉动频率从叶轮进口到叶轮出口逐渐增加,且在叶轮出口处达到极大值,导叶中则与之相反;压力脉动最剧烈的地方在叶轮出口处,各监测点的主频几乎都为叶频;次级流道叶轮和导叶各监测点压力脉动系数幅值高于首级流道各监测点;次级流道导叶内仍存在2个波峰,压力脉动并未完全消除,两级导叶内监测点主频不同.
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施卫东
徐燕
张启华
王国涛
陆伟刚
马栋棋
关键词多级潜水泵   压力脉动   动静干涉   数值模拟   特性分析     
Abstract: In order to investigate the transient operation characteristics of multi-stage submersible pumps, three-dimensional, unsteady numerical simulations were conducted by using the standard k-ε turbulence model, SIMPLEC algorithm based on the sliding mesh technique in Fluent. The perfor-mance of the pump was obtained and compared with the experimental results. Besides, the pressure pulsations at various monitoring points were acquired; subsequently they were analyzed in time and frequency domains, respectively. It was demonstrated that the pressure fluctuation at all the monitoring points changes periodically with time, its number of periods is identical to the number of blades but less affected by the number of guide vane blades, its frequency is close to the blade passing frequency. The frequency of pressure fluctuation within the impeller increases gradually towards the impeller outlet and approaches the maximum value there, while the variation tendency of the frequency is opposite within the guide vane. The mostly dramatic pressure fluctuation occurs at the impeller outlet, the main frequency at various monitoring points is almost equal to the blade passing frequency. The amplitude of pressure pulsation coefficient at the monitoring points in the second stage impeller is higher than the first stage impeller. There still are two peaks in the pressure pulsation profiles in the second stage guide vane, suggesting pressure pulsation is not eliminated completely there. Additionally, the main frequency of pressure pulsation in the first stage guide vane is different from the second stage guide vane.
Key wordsmulti-stage submersible pump   pressure pulsation   rotor-stator interaction   numerical simulation   characteristic analysis   
收稿日期: 2013-05-13;
基金资助:

国家自然科学基金资助项目(51279069);江苏省科技成果转化专项资金资助项目(BA2011126)

通讯作者: 施卫东(1964—),男,江苏南通人,研究员,博士生导师(wdshi@ujs.edu.cn),主要从事流体机械理论及工程研究.   
作者简介: 徐燕(1989—),女,江苏泰州人,硕士研究生(通信作者,xuyan15694@163.com),主要从事流体机械理论及工程研究.
引用本文:   
施卫东,徐燕,张启华等. 多级潜水泵内部压力脉动特性[J]. 排灌机械工程学报, 2014, 32(3): 196-201.
SHI Wei-Dong-,XU Yan-,ZHANG Qi-Hua- et al. Characteristics of pressure pulsation in multi-stage submersible pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(3): 196-201.
 
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