排灌机械工程学报
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排灌机械工程学报  2011, Vol. 29 Issue (6): 466-470    DOI: 10.3969/j.issn.1674—8530.2011.06.002
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  
基于流动控制技术的低比转速离心泵叶轮研发
 陈红勋, 刘卫伟, 见文, 魏培茹, 朱兵
(1.上海大学上海市应用数学和力学研究所, 上海 200072; 2.上海市力学在能源工程中的应用重点实验室, 上海 200072; 3.上海东方泵业(集团)有限公司, 上海 201906)
Development of low specificspeed centrifugal pump impellers based on flow control technique
 CHEN  Hong-Xun, LIU  Wei-Wei, JIAN  Wen, WEI  Pei-Ru, ZHU  Bing
(1.Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University,Shanghai 200072,China;  2.Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai 200072, China; 3.Shanghai East Pump(Group) Co.Ltd., Shanghai 201906, China)
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摘要 低比转速离心泵由于叶轮直径大,出口宽度小,流道扩散严重等原因,导致其效率偏低且很难改善.在计算流体动力学数值模拟和模型泵性能试验基础上,分析了低比转速离心泵效率与内部流动特性之间的关系,为改善泵内流动结构和提高效率提供依据.基于以控制边界层分离为目的的流动控制技术,提出了两种新型的离心泵叶片结构,研制了新的叶轮.为便于比较分析,对新叶轮在保证原模型泵叶轮直径、出口宽度和安装尺寸等主要几何参数不变的前提下进行加工制造,并分别将常规设计的叶片、分流叶片和两种新型叶片的叶轮在同一泵体内进行试验.试验结果表明:分流叶片提高了泵在大流量区域的效率但不能拓宽流量范围,引流叶片使水泵在更大流量范围内运行,并且在整个流量范围内都显著地提高了泵效率.流动控制技术成功地改善了低比转速离心泵内部流动结构并提高了泵性能.
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陈红勋
刘卫伟
见文
魏培茹
朱兵
关键词离心泵   低比转速   流动控制   计算流体动力学   效率     
Abstract: The efficiency of a low specificspeed centrifugal pump is low,it is very difficult to improve its efficiency due to the large impeller diameter,narrowed blade width and severe diffusion in the flow passages.Based on CFD numerical simulations and performance tests,a relationship between efficiency and internal flow characteristics of a low specificspeed centrifugal pump was analyzed to establish a basis for improving the flow structure in impeller and increasing the pump efficiency.The updatedimpellers,which were respectively with two types of blade structure proposed by using  boundary layer control techniques,were developed.In order to analyze and compare easily,the main geometric parameters  of the new impellers,such as diameter,width and installation size,were consistent with the original impeller.All the experiments on pump performance were conducted in the same casing.The experimental results show that the efficiency of pumps with splitter blades is improved in large capacity region,but the flow range is not extended.The efficiency of the pump with drainage blades is improved significantly at every flow rate.Further,the maximum flow rate is extended.The flow control techniques have been applied  successfully to improve the flow pattern in impellers and  the pump efficiency.
Key words centrifugal pump   low specific speed   flow control   computational fluids dynamics   efficiency   
收稿日期: 2011-04-27; 出版日期: 2011-11-30
基金资助:

上海市高校创新团队项目

通讯作者: 陈红勋( 1962-),男,江苏镇江人,研究员,博士生导师( chenhx@ shu.edu.cn) ,主要从事水力机械水动力学研究.   
作者简介: 刘卫伟( 1968-),男,湖南长沙人,高级工程师( liuweiwei6666@ yahoo.com.cn) , 主要从事水泵设计与制造研究.
引用本文:   
陈红勋,刘卫伟,见文等. 基于流动控制技术的低比转速离心泵叶轮研发[J]. 排灌机械工程学报, 2011, 29(6): 466-470.
CHEN Hong-Xun,LIU Wei-Wei,JIAN Wen et al. Development of low specificspeed centrifugal pump impellers based on flow control technique[J]. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(6): 466-470.
 
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