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  2015, Vol. 33 Issue (1): 49-54    DOI: 10.3969/j.issn.1674-8530.14.0131
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  
水泵水轮机增负荷过程尾水管内流场分析
李仁年1, 蒋雷1, 李琪飞1, 韩伟1, 刘保福2
1.兰州理工大学能源与动力工程学院, 甘肃 兰州 730050; 2.青海黄河上游水电开发有限责任公司工程建设分公司, 青海 西宁 810008
Analysis of flow field in draft tube of pump-turbine during load increasing period
Li Rennian1, Jiang Lei1, Li Qifei1, Han Wei1, Liu Baofu2
1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2.Qinghai Engineering Construction Branch Office, Yellow River Upstream Hydropower Development Co. Ltd., Xining, Qinhai 810008, China
 全文: PDF (1876 KB)   HTML (1 KB)   输出: BibTeX | EndNote (RIS)      背景资料
摘要 为了研究水泵水轮机增负荷过程中尾水管内的瞬态流动特性,基于Fluent动网格模型对模型水泵水轮机增负荷过程进行了全流道数值模拟.根据模拟结果,重点分析了尾水管内流场结构的演变过程.结果表明:负荷增加过程中,尾水管内锥管段至肘管段末端的压力变化规律基本相似.静压值的突增和剧烈波动过程仅发生在开度变化的初始阶段(0~0.9 s).当0.9 s以后,波动平均值不超过9.76 kPa,静压基本保持稳定;此外,发现开度较小时尾水管内存在明显的涡带和回流涡结构,容易导致机组运行的不稳定;随着开度的增大,尾水管内流态逐渐平稳,说明流量的增大会使得尾水管内流动更加流畅.
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
李仁年
蒋雷
李琪飞
韩伟
刘保福
关键词水泵水轮机   尾水管   瞬态流动   增负荷   动网格   数值模拟     
Abstract: To study the internal transient flow characteristics of the draft tube in a pump-turbine during its load increasing period, the unsteady fluid flow in the pump-turbine is simulated based on the dynamic mesh method in Fluent. According to the simulated results, the transient evolution of flow structure in the draft tube is analyzed extensively. The results show that the relationships of pressure with time are basically similar in the cone and elbow during the period. A sudden increase and remarked fluctuation in static pressure just occurs at the first period of time(0-0.9 s)during the wicket gate opening starting to change. After 0.9 s, the averaged fluctuation in the static pressure is not beyond 9.76 kPa, showing the static pressure remains constant roughly. Besides, a notable vortex rope and a reverse flow structure exist in the draft tube in smaller wicket gate openings, which can easily lead to the instability in operation of the pump-turbine. With the increasing wicket gate opening, the flow in the draft tube becomes steady gradually, suggesting the increase of flow rate can make the flow in the draft tube smoother.
Key wordspump-turbine   draft tube   transient flow   load increase   dynamic mesh   numerical simulation   
收稿日期: 2014-08-24;
基金资助:“十二五”国家科技支撑计划项目(2011BAF03B01-05);甘肃省自然科学基金资助项目(1310RJZA023)
通讯作者: 李仁年(1963—),男,甘肃民勤人,教授,博士生导师(lirn@163.com),主要从事流体机械多相流动研究.   
作者简介: 李琪飞(1975—),男,甘肃靖远人,副教授(通信作者, lqfy@lut.cn),主要从事流体机械流动理论研究.
引用本文:   
李仁年,蒋雷,李琪飞等. 水泵水轮机增负荷过程尾水管内流场分析[J]. 排灌机械工程学报, 2015, 33(1): 49-54.
LI Ren-Nian-,JIANG Lei-,LI Qi-Fei- et al. Analysis of flow field in draft tube of pump-turbine during load increasing period[J]. Journal of Drainage and Irrigation Machinery Engin, 2015, 33(1): 49-54.
 
[1] 梅祖彦. 抽水蓄能发电技术[M]. 北京:机械工业出版社,2000.
[2] 黄涛. 论水电站水力机械过渡过程[J]. 企业科技与发展,2012(15):116-117,120.
[3]   Huang Tao. On hydraulic mechanical transitional process of hydropower station[J]. Enterprise Science and Technology & Development[J]. 2012(15):116-117,120.(in Chinese)
[4] Wang Leqin, Yin Junlian, Jiao Lei, et al. Numerical investigation on the "S" characteristics of a reduced pump turbine model[J]. Science China: Technological Sciences, 2011,54(5):1259-1266.
[5] Yin Junlian, Liu Jintao, Wang Leqin, el at. Performance prediction and flow analysis in the vaned distributor of a pump turbine under low flow rate in pump mode[J]. Science China: Technological Sciences, 2010,53(12):3302-3309.
[6] 李君,王磊,廖伟丽. 可逆式水泵水轮机“S”形区域内部流场特性分析[J]. 农业工程学报,2014,30(15):106-113.
Li Jun, Wang Lei, Liao Weili. Internal flow characteristics analysis on S-shaped region of reversible pump-turbine[J]. Transactions of the CSAE, 2014,30(15):106-113.(in Chinese)
[7] Ran Hongjuan, Luo Xianwu, Zhu Lei, et al. Experimental study of the pressure fluctuations in a pump turbine at large partial flow conditions[J]. Chinese Journal of Mechanical Engineering, 2012,25(6):1205-1209.
[8] 王乐勤,刘迎圆,刘万江,等. 水泵水轮机泵工况的压力脉动特性[J]. 排灌机械工程学报, 2013,31(1):7-10,35. 浏览
Wang Leqin, Liu Yingyuan, Liu Wanjiang, et al. Pressure fluctuation characteristics of pump-turbine at pump mode[J]. Journal of Drainage and Irrigation Machinery Engineering, 2013,31(1):7-10,35.(in Chinese) 浏览
[9] 王乐勤,刘锦涛,张乐福, 等. 水泵水轮机泵工况小流量波动特性[J]. 浙江大学学报:工学版,2011,45(7):1239-1243.
Wang Leqin, Liu Jintao, Zhang Lefu, et al. Low flow′s fluctuation characteristics in pump-turbine′s pump mode[J]. Journal of Zhejiang University: Engineering Science, 2011,45(7):1239-1243.(in Chinese)
[10] Yin Junlian, Wang Dezhong, Walters D K, et al. Investigation of the unstable flow phenomenon in a pump turbine[J]. Science China Physics, Mechanics & Astronomy, 2014,57(6):1119-1127.
[11] Liu Jintao, Liu Shuhong, Sun Yuekun, et al. Three-dimensional flow simulation of transient power interruption process of a prototype pump-turbine at pump mode[J]. Journal of Mechanical Science and Technology, 2013,27(5):1305-1312.
[12] 李仁年,刘殿兴,董志强,等. 水泵水轮机“S”形区全流道数值模拟[J]. 排灌机械工程学报,2013,31(5):401-405. 浏览
Li Rennian, Liu Dianxing, Dong Zhiqiang, et al. Numerical analysis of flow in pump-turbine operating in S-shape region[J]. Journal of Drainage and Irrigation Machinery Engineering, 2013,31(5):401-405.(in Chinese) 浏览
[13] 李金伟,刘树红,吴玉林,等. 混流式水轮机飞逸过渡过程的试验与数值模拟[J]. 大电机技术, 2010(6):44-49.
[14] Li Jinwei, Liu Shuhong, Wu Yulin, et al. 3D unsteady turbulence simulation of the runaway transients of the francis turbine[J]. Large Electric Machine and Hydraulic Turbine, 2010(6):44-49.(in Chinese)
[15] 周大庆,钟淋涓,郑源,等. 轴流泵装置模型断电飞逸过程三维湍流数值模拟[J]. 排灌机械工程学报, 2012,30(4):401-406. 浏览
Zhou Daqing, Zhong Linjuan, Zheng Yuan, et al. Numerical simulation of transient flow in axial-flow pump unit model during runaway caused from power failure[J]. Journal of Drainage and Irrigation Machinery Engineering, 2012,30(4):401-406.(in Chinese) 浏览
[16] 周大庆,张蓝国. 抽水蓄能电站泵工况断电过渡过程数值试验[J]. 华中科技大学学报: 自然科学版, 2014,42(2):16-20.
Zhou Daqing, Zhang Languo. Numerical experiments in power-off transient process of pumped storage power station under pump condition[J]. J Huazhong Univ of Sci & Tech: Natural Science Edition, 2014,42(2):16-20.(in Chinese)
[17] Hellström J G I, Marjavaara B D, Lundström T S. Parallel CFD simulations of an original and redesigned hydraulic turbine draft tube[J]. Advances in Engineering Software, 2007,38(5):338-344.
[18] 王正伟,周凌九,黄源芳. 尾水管涡带引起的不稳定流动计算与分析[J]. 清华大学学报: 自然科学版, 2002,42(12):1647-1650.
Wang Zhengwei, Zhou Lingjiu, Huang Yuanfang. Simulation of unsteady flow induced by in vortices the draft tube of a Francis turbine[J]. Journal of Tsinghua University: Science and Technology, 2002,42(12):1647-1650.(in Chinese)
[19] 郑源,汪宝罗,屈波. 混流式水轮机尾水管压力脉动研究综述[J]. 水力发电, 2007,33(2):66-69.
Zheng Yuan, Wang Baoluo, Qu Bo. Study on the pressure pulse in the draft tube of francis turbine[J]. Water Power, 2007,33(2):66-69.(in Chinese)
[1] 杨凌波, 肖业祥, 唐兵, 王正伟. 基于固液两相流的纸浆泵磨损预测[J]. 排灌机械工程学报, 2015, 33(2): 98-103.
[2] 刘宜, 陈文鹏, 梁润东, 韩正杰. 旋喷泵转子腔的结构优化及数值模拟计算[J]. 排灌机械工程学报, 2015, 33(1): 26-30.
[3] 程效锐,, 张楠,, 赵伟国,. 双吸泵输送含沙水流时蜗壳内压力脉动特性[J]. 排灌机械工程学报, 2015, 33(1): 37-42.
[4] 陈世凡, 周大庆, 陈洋. 基于弱可压缩模型的抽蓄电站引水系统数值模拟[J]. 排灌机械工程学报, 2014, 32(9): 765-770.
[5] 李昳, 姜小军, 钱浩海. 黏度对凸轮转子泵效率影响的数值分析[J]. 排灌机械工程学报, 2014, 32(8): 669-673.
[6] 施卫东, 李辉, 王川, 徐媛晖. 低比转数离心泵进口预旋的数值计算[J]. 排灌机械工程学报, 2014, 32(8): 652-657.
[7] 张菲茜, 武鹏, 吴大转, 王乐勤, 张辉平. 微型旋涡泵水力特性与轴向力计算[J]. 排灌机械工程学报, 2014, 32(8): 658-662.
[8] 敏政, 梁昌平, 董志强, 刘殿兴, 覃大清, 魏显著. 混流式水泵水轮机泄漏量的计算及分析[J]. 排灌机械工程学报, 2014, 32(8): 679-684.
[9] 田飞, 施卫东, 卢熙宁, 张德胜, 郎涛. 潜水搅拌机内部压力脉动特性分析[J]. 排灌机械工程学报, 2014, 32(7): 606-610.
[10] 陈洋, 周大庆, 李玲玉, 陈世凡. 水动冷却塔直驱混流式水轮机转轮数值模拟优化[J]. 排灌机械工程学报, 2014, 32(7): 600-605.
[11] 徐茂森,, 龙新平,, 杨雪龙,, 吴伟,, 王晓川,, 王雪颖,. 喷嘴位置对新型环形射流泵性能的影响[J]. 排灌机械工程学报, 2014, 32(7): 563-566.
[12] 王文全, 尹锐, 闫妍. 不同雷诺数下混流式水轮机密封间隙通道内流动特征分析[J]. 排灌机械工程学报, 2014, 32(7): 611-616.
[13] 罗欣, 郑源, 张新. 轴流泵马鞍区流场流固耦合数值模拟[J]. 排灌机械工程学报, 2014, 32(6): 466-471.
[14] 王煜, 戴会超,, 毛劲乔, 彭秀华. 葛洲坝大江泄流对中华鲟产卵场空间分布特征的影响[J]. 排灌机械工程学报, 2014, 32(6): 487-493.
[15] 史凤霞, 杨军虎, 王晓晖. 导叶进出口角对能量回收水力透平性能的影响[J]. 排灌机械工程学报, 2014, 32(5): 378-381.

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