环形水气自激振荡射流泵提高传能效率分析与计算

邓晓刚; 曹柳

doi:10.13433/j.cnki.1003-8728.2018.0311

环形水气自激振荡射流泵提高传能效率分析与计算

doi: 10.13433/j.cnki.1003-8728.2018.0311

邓晓刚,
曹柳

1.
重庆科技学院机械与动力工程学院, 重庆 401331

基金项目:

国家自然科学基金项目（51376204）与重庆市基础与前沿研究计划项目（cstc2014jcyjA90003）资助

详细信息

作者简介:
邓晓刚(1975-),教授,博士,研究方向为流体机械内部流动,计算流体力学,dengxg@cqust.edu.cn

计量
- 文章访问数: 209
- HTML全文浏览量: 40
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2017-01-15
- 刊出日期: 2018-03-05

Analysis and Numerical Simulation of Entrainment Efficiency in Annular Water-air Self-oscillating Jet Pump

1.
Department of Machinery Engineering, Chongqing University of Science and Technology, Chongqing 401331, China

摘要

摘要: 提出环形自激振荡水射流概念，使用Realizable k-ε湍流模型对环形射流泵和环形自激振荡射流泵内部流动进行了仿真计算，结果表明：环形自激振荡射流泵提高了10%左右的吸气量；对两种射流泵内部流场进行了稳态计算，分析了面积比与吸气量之间的关系；通过瞬态计算阐述了下喷嘴处水气相间不稳定边界层的周期性运动发展过程。根据稳态和瞬态的模拟计算结果，总结出环形自激振荡射流提高对气体的卷吸效果的原因。这为提高射流泵传能效率，研制新型环形自激振荡水气射流泵奠定了理论和应用基础。
- 计算流体力学 /
- 环形射流泵 /
- 自激振荡 /
- k-ε湍流模型
Abstract: This paper presents the improved design of an annular water-air jet pump. The internal air-water two-phase flow characteristics of both conventional and improved annular water-air jet pumps were numerically investigated with the adopted Realizable k-ε turbulence model. In addition, the air-water interface development was visualized by steady and unsteady numerical simulations. The numerical results demonstrate a 10% increase of air entrainment compared with the conventional design, which is mostly attributable to the improved mass and energy transfer process due to the introduction of self-excited oscillation effect. This study contributes to a better understanding of the annular water-air jet pump's flow mechanism and demonstrates the feasibility of incorporating self-excited oscillation cavity into annular water-air jet pump design.
- computational fluid dynamics /
- annular water-air jet pump /
- self-excited oscillation /
- velocity distribution

HTML全文

参考文献(18)

[1]	El Gazzar M, Meakhail T, Mikhail S. Numerical study of flow inside an annular jet pump[J]. Journal of Thermophysics and Heat Transfer, 2006,20(4):930-932
[2]	Wang X D, Dong J L. Numerical study on the performances of steam-jet vacuum pump at different operating conditions[J]. Vacuum, 2010,84(11):1341-1346
[3]	Dong J L, Wang X D, Tu J Y. Numerical research about the internal flow of steam-jet vacuum pump:evaluation of turbulence models and determination of the shock-mixing layer[J]. Physics Procedia, 2012,32:614-622
[4]	Utomo T, Jin Z H, Rahman M, et al. Investigation on hydrodynamics and mass transfer characteristics of a gas-liquid ejector using three-dimensional CFD modeling[J]. Journal of Mechanical Science and Technology, 2008,22(9):1821-1829
[5]	Yadav R L, Patwardhan A W. Design aspects of ejectors:Effects of suction chamber geometry[J]. Chemical Engineering Science, 2008,63(15):3886-3897
[6]	袁丹青,王冠军,乌俊,等.多喷嘴射流泵数值模拟及试验研究[J].农业工程学报,2008,24(10):95-99 Yuan D Q, Wang G J, Wu J, et al. Numerical simulation and experiment study on multi-nozzle jet pump[J]. Transactions of The Chinese Society of Agricultural Engineering, 2008,24(10):95-99(in Chinese)
[7]	Park S, Yang H. Flow and oxygen-transfer characteristics in an aeration system using an annular nozzle ejector[J]. Industrial & Engineering Chemistry Research, 2013,52(4):1756-1763
[8]	Yang H C. Horizontal two-phase jet behavior with an annular nozzle ejector in the water tank[J]. Journal of Visualization, 2015,18:2):359-367
[9]	Shimizu Y, Nakamura S, Kuzuhara S, et al. Studies of the configuration and performance of annular type jet pump[J]. Journal of Fluids Engineering, 1987,109:3):205-212
[10]	Xiao L, Long X. Cavitating flow in annular jet pumps[J]. International Journal of Multiphase Flow, 2015,71:116-132
[11]	Xiao L Z, Long X P, Li X H, et al. Numerical investigation on the recirculation in annular jet pumps[J]. Journal of Mechanical Science and Technology, 2013,27(6):1603-1609
[12]	Kim Y K, Lee D Y, Kim H D, et al. An experimental and numerical study on hydrodynamic characteristics of horizontal annular type water-air ejector[J]. Journal of Mechanical Science and Technology,2012,26(9):2773-2781
[13]	Deng X G. Experimental study of self-excited oscillation pulsed jet aerator[C]//Proceedings of 2011 Environmental Pollution and Public Health, Wuhan, China:iCBBE, 2011.:60-264
[14]	Chatterjee S. Self-excited oscillation under nonlinear feedback with time-delay[J]. Journal of Sound and Vibration, 2010,330(9):1860-1876
[15]	Xu C, Liu B B, Jing S. Compact pneumatic pulse-jet pump with venturi-like reverse flow diverter[J]. Chinese Journal of Chemical Engineering,2011,19(4):626-635
[16]	Wang R H,Du Y K, Ni H J, et al. Hydrodynamic analysis of suck-in pulsed jet in well drilling[J]. Journal of Hydrodynamics, Ser. B, 2011,23(1):34-41
[17]	邓晓刚,张贤明.环形水气自激振荡射流卷吸特性模拟及优化[J].真空科学与技术学报,2013,33(11):1080-1085 Deng X G, Zhang X M. Improvement of air extracting characteristics for annular water-air self-excited oscillation jet[J]. Chinese Journal of Vacuum Science and Technology, 2013,33(11):1080-1085(in Chinese)
[18]	蔡军,淮秀兰,李勋锋.湍流作用下可压缩液体中空化泡的动力学特性[J].科学通报,2010,55(10):857-866 Cai J, Huai X L, Li X F. Investigation on cavitation bubble dynamics in compressible liquid under turbulence[J]. Chinese Science Bulletin, 2010,55(10):857-866(in Chinese)