排灌机械工程学报
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排灌机械工程学报  2013, Vol. 31 Issue (2): 93-97    DOI: 10.3969/j.issn.1674-8530.2013.02.001
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压水室结构对离心泵径向力影响的数值分析
 江伟, 李国君, 张新盛

(西安交通大学热流科学与工程教育部重点实验室, 陕西 西安 710049)
Numerical analysis the influence of collector configurations on radial force for centrifugal pumps
 JIANG  Wei, LI  Guo-Jun, ZHANG  Xin-Sheng
(Key Laboratory of Thermal Fluid Science and Engineering of MOE, Xi′an Jiaotong University, Xi′an, Shaanxi 710049, China)
 全文: PDF (1990 KB)   HTML (1 KB)   输出: BibTeX | EndNote (RIS)      背景资料
摘要 采用SST k-ω湍流模型对不同压水室结构: 单蜗壳、双蜗壳、导叶和蜗壳匹配同一叶轮的离心泵进行定常和非定常数值模拟.根据数值计算结果比较并分析3种不同结构压水室离心泵外特性、定常和非定常径向力特性.结果表明,在全流量下,单蜗壳和双蜗壳离心泵流量-扬程曲线变化平缓,效率高效区较宽;单蜗壳离心泵径向力远大于其他2种形式离心泵;导叶式离心泵径向力方向随着流量增加基本不变,其他2种形式离心泵径向力方向随着流量的增加变化较大且从隔舌向蜗壳出口移动;单蜗壳离心泵和双蜗壳离心泵径向力整体变化趋势呈椭圆分布,导叶式离心泵径向力变化无规律性;单蜗壳离心泵径向力平衡较差,瞬态径向力幅度波动远大于其他2种形式离心泵.分析结果可对离心泵径向力的认识和设计提供依据.
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江伟
李国君
张新盛
关键词压水室   离心泵   定常与非定常   数值模拟   径向力     
Abstract: Using SST k-ω turbulent model, both steady and unsteady numerical methods were applied to simulate centrifugal pumps with various collectors of single volute, double volute, and vaned diffuser with a volute, in which the same impeller was adopted. The overall characteristics, steady and unsteady radial forces characteristics of the centrifugal pumps with three different collectors were compared and analyzed according to the simulated results. The results show that the curves of capacityhead of both single volute and double volute centrifugal pump are flat and the high efficiency areas are relatively wide. Radial force of the single volute centrifugal pump is much larger than that of the other two. As flow rate increases, radial force direction of the vaned centrifugal pump changes slightly, while those of the other two change greatly and move from the tongue to the volute exit. The overall trend of radial forces of single volute and double volute centrifugal pumps is elliptic distribution, and that of the vaned centrifugal pump is irregular. Radial force balance of the single volute centrifugal pump is poor and transient amplitude fluctuations are much larger than the other two models. The research results can be beneficial reference for cognition and design of centrifugal pumps.
Key wordscollector;centrifugal pump;steady and unsteady;numerical simulation   radial force   
收稿日期: 2012-08-07; 出版日期: 2013-02-28
基金资助:

国家自然科学基金资助项目(51076126)

通讯作者: 李国君(1963—),男,吉林长春人,教授,博士生导师(liguojun@xjtu edu.cn),主要从事叶轮机械气动力学研究.   
作者简介: 江伟(1985—),男,江西抚州人,博士研究生(weijianglut@126.com),主要从事离心泵优化设计及内部流场研究.
引用本文:   
江伟,李国君,张新盛. 压水室结构对离心泵径向力影响的数值分析[J]. 排灌机械工程学报, 2013, 31(2): 93-97.
JIANG Wei,LI Guo-Jun,ZHANG Xin-Sheng. Numerical analysis the influence of collector configurations on radial force for centrifugal pumps[J]. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(2): 93-97.
 
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