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 (2): 136-140    DOI: 10.3969/j.issn.1674-8530.2012.02.003
泵理论与技术 最新目录 | 下期目录 | 过刊浏览 | 高级检索 Previous Articles  |  Next Articles  
多孔喷嘴射流泵流动模拟与涡结构分析
 龙新平, 姚鑫, 杨雪龙
(武汉大学动力与机械学院, 湖北 武汉 430072)
Flow simulation and vortex structure analysis of multinozzle jet pumps
 LONG  Xin-Ping, YAO  Xin, YANG  Xue-Long
(School of Power and Mechanical Engineering, Wuhan University, Wuhan,Hubei 430072, China)
 全文: PDF (2043 KB)   HTML (1 KB)   输出: BibTeX | EndNote (RIS)      背景资料
摘要 基于有限体积法和Realizable k-ε湍流模型,对多孔喷嘴射流泵内部流场进行数值模拟和分析,并与试验结果进行对比,验证了数值模拟的可靠性.引入涡动力学理论对喉管内部工作流体和被吸流体的混合机理进行分析,研究了喉管内部流向涡和展向涡的分布及其峰值沿流向的变化.结果表明:多孔喷嘴结构能够加快工作流体和被吸流体的混合,提高射流泵的效率;射流泵喉管内的涡结构对工作流体和被吸流体的混合有重要影响,相对流向涡而言,展向涡的强度较大,在喉管内的衰减较为平缓;在射流泵中,对两股流体起主要掺混作用的是流向涡,其强度和衰减的速率决定了混合效率;在涡量一定的情况下,流向涡越强,衰减越快;展向涡结构越小,越能加速喉管中的混合,从而提高泵的效率;喉管内涡的分布表明,位于喷嘴中心的出口可能导致较大的损失,各孔喷嘴出口应优先沿圆周方向布置.
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
龙新平
姚鑫
杨雪龙
关键词多孔喷嘴射流泵   喷嘴结构   流场分析   流向涡   展向涡     
Abstract: Based on the finite volume method and Realizable k-ε turbulence model, the flow field inside multinozzle jet pumps was investigated numerically. The calculation reliability was validated by experimental data. Based on the simulation results of streamwise and spanwise vorticity distribution and their peak value variation, the mixing mechanism of the two fluids was analyzed. The results show that the multinozzle could promote the mixing and improve pump efficiency. The vortex has great effects on the mixing. Relative to the streamwise vorticity, the spanwise vorticity value is large and the attenuation becomes flat. The streamwise vortex plays a major role in the mixing. The value and attenuation rate of streamwise vorticity determine the effect of the mixing in the throat. For a definite vorticity value, the greater the streamwise vorticity value is, the faster it decays. The smaller the spanwise vortex size, the faster the mixng, and the higher the pump efficiency. The vorticity distribution in the throat indicates a central nozzle may lead to greater losses. The optimum distribution is that all the nozzles are on a circle.
Key wordsmultinozzle jet pump   nozzle structure   flow fields analysis   streamwise vortex   spanwise vortex   
收稿日期: 2011-09-14; 出版日期: 2012-03-30
基金资助:

国家自然科学基金资助项目(51179134); 中央高校基本科研业务费专项资金资助项目(201120802020006)

通讯作者: 龙新平(1967—),男,湖北监利人,教授,博士生导师(xplong@whu.edu.cn),主要从事流体机械及工程、流体喷射技术、泵与泵装置的优化运行等研究.   
作者简介: 姚鑫(1986—),男,陕西宝鸡人,硕士研究生(yaoxinwhu@126.com),主要从事流体机械及工程研究.
引用本文:   
龙新平,姚鑫,杨雪龙. 多孔喷嘴射流泵流动模拟与涡结构分析[J]. 排灌机械工程学报, 2012, 30(2): 136-140.
LONG Xin-Ping,YAO Xin,YANG Xue-Long. Flow simulation and vortex structure analysis of multinozzle jet pumps[J]. Journal of Drainage and Irrigation Machinery Engin, 2012, 30(2): 136-140.
 
[1] 参考文献(References)
[2] 陆宏圻. 射流泵技术理论及应用[M]. 武汉: 武汉大学出版社, 2004.
[3] 姚鑫,龙新平,鄢恒飞,等.多孔喷嘴射流泵流场和性能的数值模拟[J].工程热物理学报,2011,32(S1):65-68.
Yao Xin, Long Xinping, Yan Hengfei, et al. Numerical simulation on the flow field and performance of multinozzle jet pump [J]. Journal of Engineering Thermophysics, 2011,32(S1): 65-68. (in Chinese)[3]Mallela R, Chatterjee D. Numerical investigation of the effect of geometry on the performance of a jet pump[J]. Journal of Mechanical Engineering Science, 2011, 225(7):1614-1625.
[4] Long Xinping, Yao Hao, Zhao Jianfu. Investigation on mechanism of critical cavitating flow in liquid jet pumps under operating limits [J]. International Journal of Heat and Mass Transfer, 2009, 52(9):2415-2420.
[5] 龙新平, 关云生, 王丰景,等. 补气位置对改善射流泵空化性能的试验[J]. 江苏大学学报:自然科学版, 2009, 30(3):270-273,292.
Long Xinping, Guan Yunsheng, Wang Fengjing, et al. Experiment on air supplying position for improvement of jet pump cavitation performance [J]. Journal of Jiangsu University:Natural Science Edition, 2009, 30(3): 270-273, 292. (in Chinese)
[6] Yukitaka Y, Atsushi Y, Tadashi N, et al. Studies on mixing process and performance improvement of jet pumps[J]. Journal of Fluid Science and Technology, 2007, 2(1): 238-247.
[7] Tadashi N, Yukitaka Y, Hidetoshi K, et al. Flow analysis for single and multinozzle jet pump[J]. JSME International Journal, Series B: Special Issue on Jets, Wakes and Separated Flows,2006, 49(4):933-940.
[8] 袁丹青,白滨,王冠军,等.多喷嘴射流泵流场的数值模拟与PIV测量[J]. 排灌机械, 2009, 27(1):35-38,46.
Yuan Danqing, Bai Bin, Wang Guanjun, et al. PIV measurement and numerical simulation of flow field in multinozzle jet pump [J]. Drainage and Irrigation Machinery, 2009, 27(1):35-38, 46. (in Chinese)
[9] 袁丹青,乌骏,杨敏官,等. 高空化性能多喷嘴射流离心泵的研制[J]. 农业机械学报,2008,39(4):65-68.
Yuan Danqing, Wu Jun, Yang Minguan, et al. Development of a high cavitation characteristics and multinozzle jet centrifugal pump [J]. Transactions of the Chinese Society for Agricultural Machinery, 2008,39(4):65-68. (in Chinese)
[10] Hu Hui, Kobayashi T. Vortex structures downstream a lobed nozzle/mixer[J]. Journal of Aerospace Power, 2008,23(7):1266-1278.
[1] 田飞, 施卫东, 卢熙宁, 陈斌, 欧鸣雄. 三叶片潜水搅拌机的数值模拟[J]. 排灌机械工程学报, 2012, 30(1): 11-14.
[2] 丛小青, 王光辉, 袁丹青, 贾自强. 空间导叶式离心泵的数值计算及优化设计[J]. 排灌机械工程学报, 2010, 28(6): 488-491.
[3] 谢 俊, 郭洪锍, 陈 炜, 尹小琴, 匡俐辉. 搅拌滚筒内非牛顿流体的流场分析[J]. 排灌机械工程学报, 2010, 28(6): 510-514.

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