排灌机械工程学报
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排灌机械工程学报  2016, Vol. 34 Issue (3): 191-197    DOI: 10.3969/j.issn.1674-8530.15.0035
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基于正交试验及CFD的多级离心泵叶轮优化设计
王伟1, 施卫东1, 蒋小平1, 冯琦1, 陆伟刚1, 张德胜1,2
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.江苏大学现代农业装备与技术教育部重点实验室, 江苏 镇江 212013
Optimization design of multistage centrifugal pump impeller by orthogonal experiment and CFD
WANG Wei1, SHI Weidong1, JIANG Xiaoping1, FENG Qi1, LU Weigang1, ZHANG Desheng1,2
1.National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang, Jiangsu 212013, China
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摘要 以某一典型悬臂式多级离心泵为研究对象,在原模型的基础上,对叶轮进行优化设计以提高水泵的水力性能.选择叶片出口宽度、叶轮出口直径、叶片数、叶片出口角等4个参数为因素,每个因素取3个水平,基于正交试验和数值计算对叶轮进行优化,应用计算流体动力学软件CFX 14.5对多级离心泵内三维定常流动进行数值计算.结果表明:不同工况下,多级离心泵原模型的外特性试验与数值计算结果相吻合,证明了数值预测水泵性能的正确性和可靠性.按照L9(34)正交表,计算9组叶轮设计方案的额定工况时的扬程和效率,利用极差分析研究几何参数对水泵性能的影响,最终得到优化模型.通过优化模型与原模型的数值计算结果对比,证明其扬程、效率性能得到提高,并从内部流动分析提高的原因,即泵体内部无旋涡和回流,静压梯度大,流动损失小,使得泵水力性能得到提升.
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王伟
施卫东
蒋小平
冯琦
陆伟刚
张德胜
关键词悬臂式多级离心泵   叶轮   优化设计   正交试验   数值模拟     
Abstract: In order to improve the hydrodynamic performance of a typical cantilevered multistage centrifugal pump, orthogonal experiment and numerical simulation are carried out when four main impeller geometric parameters including blade outlet width, impeller diameter, number of blades and exit blade angle are changed. A computational fluid dynamics(CFD)code is employed to simulate the three-dimensional steady turbulent flows in the pumps with the designed impellers and the same diffuser. It is shown that the predicted pump performance curves present good agreement with the experimental ones for the original pump model, indicating the numerical prediction of performance is correct and reliable. According to the L9(34)experimental design table., nine impellers are designed and the head and efficiency of the pumps with these impellers are obtained at the duty point. Simultaneously, the effect of geometric parameters on the pump performance is concluded through variance analysis, eventually an optimal set of parameters are resulted. Afterwards, by a comparison of head and efficiency between the optimized and the original models, it is illustrated that there is a significant improvement in performance in the optimized model. It is the absence of swirling and reverse flows and less hydraulic losses as well as the large pressure gradient that are responsible for the performance improvement.
Key wordscantilever multistage pump   impeller   optimization design   orthogonal experiment   numerical simulation   
收稿日期: 2015-03-03;
基金资助:国家自然科学基金资助项目(51279069);江苏省自然科学基金资助项目(BK20141302);江苏高校优势学科建设工程项目;现代农业装备与技术教育部重点实验室开放基金资助项目(NZ201305)
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: 王伟(1990—),男,江苏泰州人,硕士研究生(cujiashui@126.com),主要从事水泵研究.
引用本文:   
王伟,施卫东,蒋小平等. 基于正交试验及CFD的多级离心泵叶轮优化设计[J]. 排灌机械工程学报, 2016, 34(3): 191-197.
WANG Wei-,SHI Wei-Dong-,JIANG Xiao-Ping- et al. Optimization design of multistage centrifugal pump impeller by orthogonal experiment and CFD[J]. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(3): 191-197.
 
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