排灌机械工程学报
   首页  学报介绍  编 委 会  作者园地  征订启事  编校法规  编读往来  录用公告  广告合作   行业新闻  留  言  English 
排灌机械工程学报  2012, Vol. 30 Issue (3): 315-323    DOI: 10.3969/j.issn.1674-8530.2012.03.014
水利水电工程 最新目录 | 下期目录 | 过刊浏览 | 高级检索 Previous Articles  |  Next Articles  
泵与泵装置特性预测
严登丰

(扬州大学水利科学与工程学院, 江苏 扬州 225009)
Performance prediction for pump and pumping system
(College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China)
 全文: PDF (1995 KB)   HTML (1 KB)   输出: BibTeX | EndNote (RIS)      背景资料
摘要 根据泵和泵站的有关文献及作者提出的泵与泵装置性能(效率及临界汽蚀余量)的表达、换算方法,通过进一步的数学推演,提出了水泵及泵装置性能统一表达式.统一表达式包括:扬程通用式、流量通用式、效率通用式、临界汽蚀余量通用式等.用二次多项式表达了泵及泵装置的扬程特性;根据最小二乘法原理给出了扬程系数计算式.介绍了总效率的表达式,并给出效率常数计算方法.介绍了计及冲击损失的影响,并适用于任意工况点的汽蚀特性表达式;同时给出汽蚀余量系数的计算方法.扬程通用式、流量通用式、效率通用式、汽蚀余量通用式等是在各表达式基础上,根据原模型泵及流道内流动相似,运用水泵相似律、比例律,推导扬程系数、效率常数、汽蚀余量系数的相似关系式;综合各表达式和系数、常数相似关系式即为既适用于模型亦适用于原型的统一表达式,或称通用式.统一表达式既可用于计算,亦可用于原模型的相似换算.
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
严登丰
关键词水泵性能   泵装置性能   通用性能曲线   通用表达式   特性预测     
Abstract: Based on the existing formulas and those proposed by the author for pump and pumping system performance (efficiency and NPSHc) conversion, a further mathematical derivation was introduced and a group of universal conversion formula was developed in the paper. The universal formulas were applicable for head, flow rate, efficiency and  NPSHc. The head curves of both pump and pumping system were presented in a quadratic polynomial, and the head coefficients were calculated by using the least square method. The overall efficiency formula was detailed and the method for determining the constant involved the formula was introduced. Also, a universal NPSHc formula, which is applicable to any operating points, and where the shock loss effect is include, was provided in this paper. The approach for determining the coefficient in that formula was proposed as well. The universal formulas for head, flow rate, efficiency and NPSHc were derived according to flow similarity in pumps and by means of the affinity laws of pump, and presented with head coefficient, efficiency constant and NPSHc coefficient. All the formulas, their coefficients and constants were integrated into one formula, respectively; thus they were considered as universal ones, which are applicable to both model and prototype pumps. The universal formulas can be used to estimate pump and pumping system performance and carry out performance conversion from model to prototype.
Key wordspump characteristics   pump system characteristics   universal performance curve   universal formula   performance prediction   
收稿日期: 2011-11-12; 出版日期: 2012-04-10
基金资助:

国家自然科学基金资助项目(50279045)

通讯作者: 严登丰(1940—),男,江苏盱眙人,教授,博士生导师(yzdxydf@yahoo.com.cn),主要从事泵与泵站工程研究.   
引用本文:   
严登丰. 泵与泵装置特性预测[J]. 排灌机械工程学报, 2012, 30(3): 315-323.
YAN Deng-Feng. Performance prediction for pump and pumping system[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(3): 315-323.
 
[1] 参考文献(References)
[2] 张仁田,岳修斌,朱红耕,等. 基于CFD的泵装置性能预测方法比较[J]. 农业机械学报,2011,42(3):86-90.
Zhang Rentian, Yue Xiubin, Zhu Honggeng, et al. Comparison on performance prediction methodologies of lowhead pump systems based on CFD[J]. Transactions of the Chinese Society for Agricultural Machinery, 2011,42(3):86-90.(in Chinese)
[3] 郑源,肖玉平,刘文明,等.大型竖井式贯流泵装置的数值模拟与性能预测[J].排灌机械,2009,27(6):393-397.
Zheng Yuan, Xiao Yuping, Liu Wenming, et al. Numerical simulation and performance prediction for largescale shaftwell tubular pumping system[J]. Drainage and Irrigation Machinery, 2009,27(6):393-397.(in Chinese)
[4] 严登丰.泵站工程[M].北京:中国水利水电出版社,2005:363-387.
[5] 严登丰,叶健,陈茂满,等.泵及泵装置效率表达与换算[J].排灌机械,2007,25(1):1-8.
Yan Dengfeng, Ye Jian, Chen Maoman, et al. Efficiency formula and converting method for pump and pumping system[J]. Drainage and Irrigation Machinery, 2007,25(1):1-8.(in Chinese)
[6] 李彦军,严登丰,袁寿其.大型低扬程泵与泵装置特性预测[J].农业机械学报,2007,38(10):36-40.
Li Yanjun, Yan Dengfeng, Yuan Shouqi. Performance prediction for large lowhead pump and pumping installation[J].Transactions of the Chinese Society for Agricultural Machinery,2007,38(10):36-40.(in Chinese)
[7] 刘宁,汪易森,张纲.南水北调工程水泵模型同台测试[M].北京:中国水利水电出版社,2006:32-85.
[8] Donad F Young,Bruce R Munson,Theodore H Okiishi, et al. Fundamentals of Fluid Mechanics[M]. 5ed. New York:GTS Companies(Wiley),2007:289-301,410-432.
[9] 关醒凡.现代泵理论与设计[M].北京:中国宇航出版社,2011:507-509.
[10] 特罗斯科兰斯基 A T,拉扎尔基维茨 S.叶片泵计算与结构[M]. 耿惠彬,译. 北京:机械工业出版社,1981:49-55.
[1] 汤 跃, 赵 坤, 许文博. 基于Excel的水泵性能试验数据处理的VBA开发[J]. 排灌机械工程学报, 2011, 29(2): 123-126.
[2] 冯卫民, 宋 立, 左 磊, 袁 波. 轴流泵装置三维非定常湍流流场的数值模拟[J]. 排灌机械工程学报, 2010, 28(6): 531-536.

江苏大学梦溪校区(镇江市梦溪园巷30号)图书馆5楼 0511-84440893 传真0511--84440033
Copyright 江苏大学杂志社 2010-2015 All Rights Reserved