电磁力控制湍流边界层分离圆柱绕流场特性数值分析

尹纪富; 尤云祥; 李巍; 胡天群

doi:10.7498/aps.63.044701

摘要

在亚临界区高雷诺数Re=1.4×105下，采用脱体涡模拟结合湍流分离的方法对弱电解质中电磁力作用下湍流边界层分离圆柱绕流场及其升（阻）力特性进行了数值模拟和分析. 结果表明，电磁力可以提高圆柱体湍流边界层内的流体动能，延缓圆柱体湍流边界层的流动分离，减弱圆柱体湍流绕流场中在流向和展向上大尺度漩涡的强度，减小圆柱体阻力时均值及其升力脉动幅值. 当电磁力作用参数大于某个临界值后，湍流边界层流动分离消失，在圆柱体尾部产生射流现象，从而电磁力对圆柱体产生净推力作用，出现负阻力现象，而且升力脉动幅值接近于零，出现圆柱体升力消失现象.

关键词:

Abstract

A detached eddy simulation method with the turbulent separation is presented to simulate and analyze the characteristics for the flow around a circular cylinder with a turbulent boundary layer separation and its lift/drag coefficients in a weakly conductive fluid at a high subcritical Reynolds number 1.4×105 under an electromagnetic force. The results show that the electromagnetic force can increase the fluid kinetic energy near the turbulent boundary layer, delay the turbulent boundary layer separation of the flow around the circular cylinder, and weaken the intensity of the large-scale eddy in the turbulent flow around the circular cylinder in the streamwise and spanwise directions, reduce the time-average drag, and inhibit the lift fluctuation amplitude on the circular cylinder. Moreover, after the electromagnetic force parameter reaches a certain critical value, the turbulent boundary layer separation disappears and the jet phenomenon appears in the wake of the circular cylinder, so that the electromagnetic force produces the thrust action on the circular cylinder and the negative drag occurs, and the lift fluctuation amplitude declines to almost zero and the lift phenomenon on the circular cylinder disappears.

Keywords:

作者及机构信息

1.
上海交通大学, 海洋工程国家重点实验室, 上海 200240

基金项目: 国家自然科学基金（批准号：11272211）和上海交通大学海洋工程国家重点实验室研究基金（批准号：GP010819）资助的课题.

Authors and contacts

1.
State Key Laboratory of Ocean Engineering, Shanghai Jiaotong University, Shanghai 200240, China

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 11272211) and the Research Foundation for State Key Laboratory of Ocean Engineering of Shanghai Jiaotong University, China (Grant No. GP010819).

参考文献

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施引文献

[1]	Williamson C H K 1996 Annu. Rev. Fluids Mech. 28 477
[2]	Gad-el-Hak M, Bushnell D M 1991 J. Fluids Eng. 113 5
[3]	Zdravkovich M M 1981 J. Wind Eng. Ind. Aerod. 7 145
[4]	Kwon K, Choi H 1996 Phys. Fluids 8 479
[5]	Li Z, Navon I M, HussainiM Y, LeDimet F X 2003 Comput Fluids 32 149
[6]	Atktin C J, Mughal M S 2005 35th AIAA Fluid Dyna mics Conference Exhibit (Toronto: AIAA) p5263
[7]	Chen H 2011 Ph. D. Dissertation (Wuhan: Huazhong University of Science and Technology) (in Chinese) [陈虹 2011 博士学位论文 (武汉: 华中科技大学)]
[8]	Jukes T, Choi K S 2007 IUTAM Symposium on Unsteady Separated Flows and Their Control (Corfu: IUTAM) p539
[9]	Mei D J, Fan B C, Chen Y H, Ye J F 2010 Acta Phys. Sin. 59 8335 (in Chinese) [梅栋杰, 范宝春, 陈耀慧, 叶经方2010 59 8335]
[10]	Feng L H, Wang J J 2010 J. Fluid Mech. 662 232
[11]	Liu Z K, Zhou B M, Liu H X, Liu Z G, Huang Y F 2011 Acta Phys. Sin. 60 084701 (in Chinese) [刘宗凯, 周本谋, 刘会星, 刘志刚, 黄翼飞 2011 物理学报 60 084701]
[12]	Weier T, Gerbeth G, Mutschke G, Platacis E, Lielausis O 1998 Exp. Therm. Fluid Sci. 16 84
[13]	Kim S J, Lee C M 2000 Exp. Fluids 28 252
[14]	Weier T, Fey U, Gerbeth Q, Mutschke G, Lielausis O, Platacis E 2001 Magnetohrodynamics 37 177
[15]	Kim S J, Lee C M 2001 Fluid Dyn. Res. 29 47
[16]	Oliver P Roger G 2001 Eur. J. Mech. B 20 255
[17]	Zhou B M, Fan B C, Chen Z H, Ye J F, Ding H X, Jin J M 2004 J. Exp. Mech. 19 242 (in Chinese) [周本谋, 范宝春, 陈志华, 叶经方, 丁汉新, 靳建明 2004 实验力学 19 242]
[18]	Zhang H, Fan B C, Chen Z H 2007 Eng. Mech. 24 164 (in Chinese) [张辉, 范宝春, 陈志华 2007 工程力学 24 164]
[19]	Zhang H, Fan B C, Chen Z H 2009 J. Exp. Mech. 24 427 (in Chinese) [张辉, 范宝春, 陈志华 2009 实验力学 24 427]
[20]	Yin J F, You Y X, Hu T Q, Zhao L M, Wang L, Zhou Y M, Chen H 2013 Chin. J. Theor. Appl. Mech. 45 493 (in Chinese) [尹纪富, 尤云祥, 胡天群, 赵良明, 王磊, 周友明, 陈虹 2013 力学学报 45 493]
[21]	Yin J F, Li W, You Y X, Hu T Q 2013 Chin. J. Hydrodyn. 28 495 (in Chinese) [尹纪富, 李巍, 尤云祥, 胡天群 2013 水动力学研究与进展 28 495]
[22]	Zhang H, Fan B C, Chen Z H, Li Y L 2011 Fluid Dyn. Res. 43 015506
[23]	Muk C O, Torbjorn U, Lars E H, Dag M 2009 Mar. Struct. 22 142
[24]	Mittal R, Balachandar S 1995 Phys. Fluids 7 1841
[25]	Travin A, Shur M, Strelets M, Spalart P 2000 Flow Turbul. Combust. 63 293
[26]	Hansen R P, Forsythe J R 2003 41st AIAA Aerospace Sciences Meeting and Exhibit (Reno: AIAA) p775
[27]	Krishnan V, Squires K D 2006 44th AIAA Aerospace Sciences Meeting and Exhibit (Reno: AIAA) p901
[28]	Dong S, Karniadakis G E 2005 J. Fluids Struct. 20 519
[29]	Benim A C, Pasqualotto E, Suh S H 2008 Prog. Comput. Fluid Dyn. 5 299
[30]	Zhang Z S, Cui G X, Xu C X 2005 Theory and Modeling of Turbulence (Beijing: Tsinghua University Press) p233 (in Chinese) [张兆顺, 崔桂香, 许春晓 2005 湍流理论与模拟 (北京: 清华大学出版社) 第233页]
[31]	Roshko A 1961 J. Fluid Mech. 10 345
[32]	Hunt J C R, Wray A, Moin P 1988 Eddies, Stream, and Convergence Zones in Turbulent Flows (Stanford: Center for Turbulence Research Report) p193

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