排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2012, Vol. 30 Issue (2): 136-140    DOI: 10.3969/j.issn.1674-8530.2012.02.003
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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)
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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.
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LONG Xin-Ping
YAO Xin
YANG Xue-Long
Key wordsmultinozzle jet pump   nozzle structure   flow fields analysis   streamwise vortex   spanwise vortex     
Received: 2011-09-14; Published: 2012-03-30
Cite this article:   
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.
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