排灌机械工程学报
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排灌机械工程学报  2014, Vol. 32 Issue (8): 652-657    DOI: 10.3969/j.issn.1674-8530.13.0190
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  
低比转数离心泵进口预旋的数值计算
施卫东1, 李辉2, 王川1, 徐媛晖1
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.新界泵业集团股份有限公司, 浙江 温岭 317525
Numerical calculation of inlet prewhirl flow in low-specific-speed centrifugal pump
Shi Weidong1, Li Hui2, Wang Chuan1, Xu Yuanhui1
1.National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Shimge Pump Industry Group Co. Ltd., Wenling, Zhejiang 317525, China
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摘要 为研究预旋对泵性能的影响,基于欧拉方程和斯托道拉方法,采用径向前置导叶实现预旋,以CFD软件Fluent为平台,以单级低比转数离心泵为研究对象,改变前置导叶几何参数设计3组方案,通过对3组前置导叶预旋方案进行数值模拟,从内部流场和外特性分析预旋对离心泵无过载性能的影响.结果表明:从内流场上看,预旋越强,导叶出口圆周速度越大.若不考虑边壁影响,圆周速度沿径向由内到外呈增大趋势,沿流动方向,圆周速度略有减小,与速度矩保持定理有一定的偏差.从外特性上看,通过增加预旋获得了陡降的H-Q曲线及平坦的P-Q曲线,并且效率在小流量到额定流量附近还略有提高,因此,通过预旋实现全扬程无过载是可行的.
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施卫东
李辉
王川
徐媛晖
关键词低比转数泵   预旋   数值模拟   前置导叶     
Abstract: A single-stage low specific speed centrifugal pump was studied based on the Euler equation and Stodola method on the platform of Fluent considering the inlet prewhirl by using radial inlet guide vanes to study the influence of prewhirl on pump performance. The effect of prewhirl flow on non-overload performance of a centrifugal pump was analyzed through the internal flow field and external chara-cteristic obtained from the numerical simulation of three schemes with different geometric parameters of inlet guide vanes. The results shows: the circumferential velocity at the exit of guide vanes increases with the enhancement of the inlet prewhirl. According to the internal flow field from inside to outside along the radial direction, the circumferential velocity shows the increasing trend and slightly reduces along flow direction without considering the effect of boundary which is different with VuR=constant. Sharp down head curves and flat power curves can be obtained by the enhancement of the inlet prewhirl flow and the efficiency is improved slightly near the region from small flow rate to rated flow. Therefore, it is possible to realize the non-overload performance in the total head range by using prewhirl flow.
Key wordslow specific speed pump   inlet prewhirl   numerical simulation   inlet guide vanes   
收稿日期: 2013-09-17;
基金资助:

国家自然科学基金资助项目(51279069);江苏省科技支撑计划项目(BE2012150)

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),主要从事流体机械及工程研究.   
作者简介: 李辉(1987—),男,四川达州人,硕士(philp2006@126.com),主要从事流体机械研究.
引用本文:   
施卫东,李辉,王川等. 低比转数离心泵进口预旋的数值计算[J]. 排灌机械工程学报, 2014, 32(8): 652-657.
SHI Wei-Dong-,LI Hui-,WANG Chuan- et al. Numerical calculation of inlet prewhirl flow in low-specific-speed centrifugal pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2014, 32(8): 652-657.
 
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