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  2016, Vol. 34 Issue (8): 657-664    DOI: 10.3969/j.issn.1674-8530.15.0238
最新目录 | 下期目录 | 过刊浏览 | 高级检索 Previous Articles  |  Next Articles  
口环间隙对诱导轮离心泵空化流动和性能的影响
肖丽倩1, 黎义斌1,2, 刘宜1,2, 毕祯1, 赵伟国1,2
1.兰州理工大学能源与动力工程学院, 甘肃 兰州 730050; 2.甘肃省流体机械及系统重点实验室, 甘肃 兰州 730050
Effect of wear-ring clearance on cavitation flow and performance of centrifugal pump with inducer
XIAO Liqian1, LI Yibin1,2, LIU Yi1,2, BI Zhen1, ZHAO Weiguo1,2
1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2.Key Laboratory of Fluid Machinery and Systems, Lanzhou, Gansu 730050, China
 全文: PDF (5297 KB)   HTML (1 KB)   输出: BibTeX | EndNote (RIS)      背景资料
摘要 为了研究口环间隙对前置诱导轮离心泵空化性能的影响,基于RNG k-ε湍流模型和Rayleigh-Plesset方程均相流空化模型,以前置诱导轮离心泵为研究对象,选取口环间隙为0.15,0.25,0.40和0.60 mm这4种方案对其进行空化流动数值计算,并与试验结果对比分析.研究结果表明,口环间隙大小对诱导轮离心泵的外特性和空化性能影响较大,随着口环间隙的增大,总扬程效率和叶轮扬程效率均减小,与口环间隙为0.15 mm时相比,总扬程效率和叶轮扬程效率分别降低了0.60%和4.21%,效率分别下降了6.50%和9.32%;而口环间隙的增大使得诱导轮扬程和效率均增加,分别增大了29.86%和28.40%.另外,随着口环间隙的增大,空化性能曲线出现波动现象,间隙越大,波动越明显;离心泵主叶轮工作面靠近前盖板出现云状空泡分布,空化不稳定,间隙越大,空化越不稳定,临界空化数越大.经分析,引起空化不稳定性的因素可能有: 口环间隙出口处泄漏高压流体对主流的冲击;口环附近空化的发生以及诱导轮空化引起叶片出口液流角的变化.
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
肖丽倩
黎义斌
刘宜
毕祯
赵伟国
关键词诱导轮离心泵   口环间隙   外特性   空化性能   数值模拟     
Abstract: In order to investigate the effect of wear-ring clearance on the cavitation performance of the centrifugal pump with THE pre-positioned inducer, the cavitation flow and performance in the centrifugal pump with the pre-positioned inducer were numerically simulated with four different projects which were 0.15,0.25,0.40 mm and 0.60 mm based on the RNG k-ε turbulent model combined with Rayleigh-Plesset Homogeneous cavitation model,and compared with experimental results. The results show that the size of the wear-ring clearance has a greater influence on the external performance and cavitation performance; with the increase of the wear-ring clearance, compared with 0.15 mm, the total head efficiency and the head efficiency of the impeller decrease, the changes of the head are up to 0.60%,4.21%,and the changes of the efficiency are up to 6.50%,9.32%. Moreover, the head and efficiency of the inducer increase, and they are up to 29.86%,28.40%.The cavitation curves wave with the increase of the wear-ring clearance and the decrease of the cavitation number, and the wider the clearanceis, the more obvious the flactuationis. The cloudy cavitation bubbles are distributed on the pressure surface that is close to the front shroud, which causes cavitation instability, and the wider the clearanceis, the more the cavitaionis,the greater the critical cavitation numberis. It is found that the factors that influence the cavitation instability of the pump are possibly related to the impact of leakage high-pressure fluid of the wear-ring outlet on the main flow,the occurrence of cavitation at the intersection of impeller inlet and wear-ring clearance outlet and the change of the outlet flow angel caused by cavitating in the pre-positioned inducer.
Key wordscentrifugal pump with inducer   wear-ring clearance   external performance   cavitation performance   numerical simulation   
收稿日期: 2015-11-02;
基金资助:国家自然科学基金资助项目(51369015);甘肃省科技计划项目(145RJZA047)
通讯作者: 黎义斌(1977—)男,甘肃临洮人,副教授,博士(通信作者,liyibin58@163.com),主要从事流体机械内部特性流动研究.   
作者简介: 肖丽倩(1990—)女,甘肃景泰人,硕士研究生(xlq0214@163.com),主要从事流体机械内部特性流动研究.
引用本文:   
肖丽倩,黎义斌,等. 口环间隙对诱导轮离心泵空化流动和性能的影响[J]. 排灌机械工程学报, 2016, 34(8): 657-664.
XIAO Li-Qian-,LI Yi-Bin-, et al. Effect of wear-ring clearance on cavitation flow and performance of centrifugal pump with inducer[J]. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(8): 657-664.
 
[1] 罗先武,张瑶,彭俊奇,等. 叶轮进口几何参数对离心泵空化性能的影响[J]. 清华大学学报(自然科学版),2008,48(5):836-839.
LUO Xianwu, ZHANG Yao, PENG Junqi, et al. Effect of impeller inlet geometry on centrifugal pump cavitation performance[J]. J Tsinghua University(sci & tech), 2008, 48(5): 836-839.(in Chinese)
[2] 刘宜,李永乐,韩伟,等. 离心泵的进口几何参数对泵空化性能的影响[J]. 兰州理工大学学报,2011,37(1):50-53.
[3] LIU Yi, LI Yongle, HAN Wei, et al. Effect of geometric parameters of centrifugal pump inlet on its cavitation performanc[J] Journal of Lanzhou University of Technology, 2011, 37(1):50-53.(in Chinese)
[4] 张永学,宋鹏飞,许聪,等. 预旋调节对离心泵空化影响的试验与数值模拟[J]. 农业机械学报,2014,45(9):131-137.
ZHANG Yongxue, SONG Pengfei, XU Cong, et al. Experimental and numerical investigations of cavitation in a centrifugal pump with pre-whirl regulation[J].Transactions of the CSAM, 2014,45(9):131-137.(in Chinese)
[5] SAMANODY M A E, GHORAB A, MOSTAFA M A F. Investigations on the performance of centrifugal pumps in conjunction with inducers[J]. Ain shams engineering journal, 2013, 5(1):149-156.
[6] 舒安庆, 张生, 赵彦修. 加装诱导轮改善离心泵抗汽蚀性能[J]. 化工设备与管道, 2003, 40(3):34-36.
SHU Anqing, ZHANG Sheng, ZHAO Yanxiu. Use of inducer for improving property of anti-cavitation of centrifugal pump[J]. Process equipment & piping, 2003, 40(3):34-36.(in Chinese)
[7] HASSAN W, BARRE S, LEGOUPIL S. Study of the behavior of vapor fraction in a turbopump inducer using an X-ray measurement technique[J]. Experiments in fluids, 2014, 55(5):1-14.
[8] 李晓俊.离小泵叶片前缘空化非定常流动机理及动力学特性研究[D].镇江:江苏大学,2013.
[9] GUO X M, ZHU L, ZHU Z C, et al. Numerical and experimental investigations on the cavitation characteristics of a high-speed centrifugal pump with a splitter-blade inducer[J]. Journal of mechanical science & technology, 2015, 29(1):259-267.
[10] 郭晓梅,朱祖超,崔宝玲,等.诱导轮长短叶片位置对高速离心泵汽蚀性能的影响[J].工程热物理学报,2012,33(10):1695-1698.
GUO Xiaomei, ZHU Zuchao, CUI Baoling, et al. Inducer-short blade position influence on cavitation performance of high speed centrifugal pump[J].Journal of engineering thermophysics, 2012,33(10):1695-1698.(in Chinese)
[11] 郭晓梅,李昳,崔宝玲,等.前置不同诱导轮高速离心泵旋转空化特性研究[J].航空学报,2013,34(7):1572-1581.
GUO Xiaomei, LI Yi, CUI Baoling, et al. Research on the rotation cavitation performance of high-speed rotation centrifugal pump with different pre-positioned inducer[J]. Acta aeronautica et astronautica sinica, 2013,34(7):1572-1581.(in Chinese)
[12] LI W G. An experimental study on the effect of oil viscosity and wear-ring clearance on the performance of an industrial centrifugal pump[J]. Journal of fluids engineering, 2012, 134(1):93-108.
[13] 赵伟国,邬国秀,黎义斌,等. 口环间隙变化对离心泵性能的影响研究[J]. 水力发电学报,2014,33(5):211-215.
ZHAO Weiguo, WU Guoxiu, LI Yibin, et al. Study on effects of wear-rings clearance modifications on performance of centrifugal pump[J]. Journal of hydroelectric engineering, 2014,33(5):211-215.(in Chinese)
[14] 黄先北,刘竹青,杨魏. 离心泵口环间隙附近的空化特性研究[J].农业机械学报,2015,46(2):59-63.
HUANG Xianbei, LIU Zhuqing, YANG Wei. Cavitation characteristics of centrifugal pump near wear-ring clearance[J].Transactions of the CSAM, 2015,46(2):59-63.(in Chinese)
[15] 王福军.计算流体动力学分析[M].北京:清华大学出版社,2004.
[16] 常书平,王永生. 基于CFD的混流泵空化特性研究[J]. 排灌机械工程学报,2012,30(2):171-175. 浏览
CHANG Shuping, WANG Yongsheng. Cavitation performance research of mixed-flow pump based on CFD[J]. Journal of drainage and irrigation machinery engineering, 2012, 30(2): 171-175.(in Chinese)
[17] 关醒凡.现代泵理论与设计[M].北京:中国宇航出版社,2011.
[18] 何立东,叶小强,霍耿磊. 叶尖密封流场的细观特性对叶轮机械性能的影响[J]. 润滑与密封,2006(4):171-174.
[19] HE Lidong, YE Xiaoqiang, HUO Genglei. The influence of mesoscopic characteristic of tip seal flow field on turbomachinery[J].Lubrication engineering,2006(4):171-174.(in Chinese)
[20] 潘中永,袁寿其. 泵空化基础[M].镇江:江苏大学出版社,2013.
[21] FU Y, YUAN J, YUAN S, et al. Numerical and experimental analysis of flow phenomena in a centrifugal pump operating under low flow rates[J]. Journal of fluids engineering, 2014, 137(1):205-207.
[1] 付强, 张本营, 朱荣生, 曹梁. 转速对核主泵空化特性的影响[J]. 排灌机械工程学报, 2016, 34(8): 651-656.
[2] 燕浩, 柴立平, 李跃, 李强, 石海峡. 大型排水泵装置空化区间的数值计算[J]. 排灌机械工程学报, 2016, 34(8): 679-685.
[3] 龙新平,, 刘琦,, 阮晓峰,, 陈正文, 薛胜雄, 武子全. 后混式磨料射流喷嘴内部流场模拟及分析[J]. 排灌机械工程学报, 2016, 34(8): 686-692.
[4] 张金凤, 黄茜, 袁寿其, 冒杰云, 王业芳. 基于PIV的低比转数离心泵网格无关性[J]. 排灌机械工程学报, 2016, 34(7): 567-572.
[5] 夏水晶, 袁建平, 孙潇, 周帮伦, 李彦军. 轴流泵叶片的参数化造型及多参数优化[J]. 排灌机械工程学报, 2016, 34(7): 603-607.
[6] 李仁年,, 毕祯, 黎义斌,, 肖丽倩. 诱导轮偏转角对离心泵叶轮空化性能的影响[J]. 排灌机械工程学报, 2016, 34(6): 461-469.
[7] 朱荣生, 陈宗良, 王秀礼, 曹梁. CAP1400核主泵空化特性数值研究[J]. 排灌机械工程学报, 2016, 34(6): 490-495.
[8] 李贵东, 王洋, 郑意, 马小虎, 梁龙一, 胡日新. 气液两相条件下离心泵内部流态及受力分析[J]. 排灌机械工程学报, 2016, 34(5): 369-374.
[9] 崔宝玲, 方晨, 葛明亚. 低比转数离心泵内部流动特性和外特性试验[J]. 排灌机械工程学报, 2016, 34(5): 375-380.
[10] 张前, 袁寿其, 刘俊萍, 鲍亚. 低压喷头喷嘴优化设计及内部流场数值模拟[J]. 排灌机械工程学报, 2016, 34(5): 449-454.
[11] 康灿, 李利婷, 鲁国辉. 导叶开度对贯流式水轮机性能及流动特征的影响[J]. 排灌机械工程学报, 2016, 34(5): 406-413.
[12] 李彩虹, 薛志宽, 李红. 叶轮前盖板与泵体轴向间隙对轴向力的影响[J]. 排灌机械工程学报, 2016, 34(4): 295-300.
[13] 周大庆, 刘跃飞. 基于VOF模型的轴流泵机组起动过程数值模拟[J]. 排灌机械工程学报, 2016, 34(4): 307-312.
[14] 王宁, 黄彪, 吴钦, 王国玉. 绕水翼空化流动及振动特性的试验与数值模拟[J]. 排灌机械工程学报, 2016, 34(4): 321-327.
[15] 王伟, 施卫东, 蒋小平, 冯琦, 陆伟刚, 张德胜,. 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.

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