电磁力控制翼型绕流分离的增升减阻效率研究

陈耀慧; 栗保明; 潘绪超; 刘怡昕

doi:10.6052/0459-1879-14-346

电磁力控制翼型绕流分离的增升减阻效率研究

1 南京理工大学瞬态物理重点实验室, 南京210094
2 南京理工大学智能弹药技术国防重点学科实验室, 南京210094

基金项目: 重点实验室基金(9140C300502130C30105)和装备预研基金(9140C300206150C30002)资助项目.

详细信息

通讯作者:
陈耀慧,讲师,主要研究方向:流动控制.E-mail:cyh873@163.com

中图分类号: O361
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出版历程
- 收稿日期: 2014-11-05
- 修回日期: 2015-03-03
- 刊出日期: 2015-05-17

RESEARCH OF THE CONTROL EFFICIENCY OF LIFT INCREASE AND DRAG REDUCTION BASE ON FLOW AROUND HYDROFOIL CONTROLLED BY LORENTZ FORCE

1 National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China
2 Ministerial Key Laboratory of ZNDY, University of Science and Technology, Nanjing 210094, China

Funds: The project was supported by the Key Laboratory Fund (9140C300502130C30105) and Equipment pre-research fund (9140C300206150C30002).

摘要

摘要: 电磁力可有效对流体流动进行控制,增升减阻,抑制流动分离,制约其推广应用的瓶颈为控制效率问题.为提高其控制效率,基于翼型绕流的电磁力控制,对电磁力增升减阻的控制效率问题进行数值研究. 根据能量守恒定律,推导电磁力控制能耗的比,基于升力和阻力计算节省能量. 定义电磁力的控制效率为能量节省与电磁力控制所需能耗的比值,研究不同工况下电磁力增升减阻的控制效率. 发现在控制开始阶段,电磁力能量主要消耗在增加边界层流体的动能上,电磁力控制效率非常低,但电磁力控制效率会随着电磁力工作时间的增长而增加;电磁力控制效率随着来流速度的增加呈指数下降;通过增加电磁力激活板的输入能量可增强电磁力的控制效果,但无法明显增加其控制效率.
- 电磁力 /
- 翼型绕流 /
- 流动控制 /
- 控制效率
Abstract: Lorentz force can control the flow of low-conduction fluid effectively,increasing lift and reducing drag, suppressing flow separation; however, the problem of control efficiency is the main bottleneck to restrict its application. In order to enhance its control efficiency, numerical simulation research had been carried out base on the flow control around hydrofoil using Lorentz force. Energy consumption of Lorentz force control had deduced on the basis of the law of conservation of energy; the amount of saving energy had calculated by using the lift and drag of hydrofoil. The control efficiency of the Lorentz force is defined as the ratio between saved power and used power. The control efficiency of lift increase and drag reduction under different working conditions had been studied. The results had shown that the control efficiency of Lorentz force index decrease with the increase of inflow velocity, and increase with the control time increase. To increase the input energy of Lorentz force actuator can enhance the control effect of Lorentz force, but cannot increase the control efficiency distinctly.
- Lorentz force /
- flow around hydrofoil /
- flow control /
- control efficiency

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参考文献(15)

Pulugundla G, Heinicke C, Karcher C, et al. Lorentz force velocimetry with a small permanent magnet. European Journal of Mechanics-B/Fluids, 2013, 41: 23-28

Gailitis A, Lielausis O. On the possibility of drag reduction of a flat plate in an electrolyte. Appl Magnetohydrodyn Trudy Inst Fisiky AN Latvia SSR, 1961, 12: 143

Henoch C, Stace J. Experimental investigation of a salt water turbulent boundary layer modified by an applied streamwise magnetohydrodynamic body force. Physics of Fluids, 1995, 7: 1371-1383

Berger TW, Kim J, Lee C, et al. Turbulent boundary layer control utilizing the Lorentz force. Physics of Fluids, 2000, 12: 631-649

Pang J, Choi K-S. Turbulent drag reduction by Lorentz force oscillation. Physics of Fluids, 2004, 16: L35

Du Y, Symeonidis V, Karniadakis G. Drag reduction in wall-bounded turbulence via a transverse travelling wave. Journal of Fluid Mechanics, 2002, 457: 1-34

Mutschke G, Gerbeth G, Albrecht T, et al. Separation control at hydrofoils using Lorentz forces. European Journal of Mechanics-B/Fluids, 2006, 25: 137-152

Zhang H, Fan BC, Chen ZH, et al. Electro-magnetic control of shear flow over a cylinder for drag reduction and lift enhancement. Chinese Physics B, 2013, 22: 104701

梅栋杰, 范宝春, 陈耀慧等. 槽道湍流展向振荡电磁力控制的实验研究. 物理学报, 2010, 59: 8335-8342 (Mei Dongjie, Fan Baochun, Chen Yaohui, et al. Experimental investigation on turbulent channel flow utilizing spanwise oscillating Lorentz force. Acta Physica Sinica, 2010, 59: 8335-8342 (in Chinese))

尹纪富, 尤云祥, 李巍等. 电磁力控制湍流边界层分离圆柱绕流场特性数值分析. 物理学报, 2014, 63: 044701 (Yin Jifu, You Yunxiang, Li Wei, et al. Numerical analysis for the characteristics of flow control around a circular cylinder with a turbulent boundary layer separation using the electromagnetic force. Acta Physica Sinica, 2014, 63: 044701 (in Chinese))

Liu ZK, Zhou BM, Liu HX, et al. Numerical investigation on feedback control of flow around an oscillating hydrofoil by Lorentz force. Fluid Dynamics Research, 2013, 45: 035502

Shatrov V, Gerbeth G. Magnetohydrodynamic drag reduction and its efficiency. Physics of Fluids, 2007, 19: 035109

陈耀慧, 范宝春, 陈志华等. 翼型绕流电磁控制的实验和数值研究. 物理学报, 2008, 57: 648-653 (Chen Yaohui, Fan Baochun, Chen Zhihua, et al. Experimental and numerical inve stigations on the electro-magnetic control of hydrofoil wake. Acta Physica Sinica, 2008, 57: 648-653 (in Chinese))

陈耀慧, 董祥瑞, 陈志华等. 翼型绕流的洛仑兹力控制机理. 物理学报, 2014, 63: 034701 (Chen Yaohui, Dong Xiangrui, Chen Zhihua, et al. Control of flow around hydrofoil using the Lorentz force. Acta Physica Sinica, 2014, 63: 034701 (in Chinese))

Rogers SE, Kwak D, Kiris C. Steady and unsteady solutions of the incompressible Navier-Stokes equations. AIAA Journal, 1991, 29: 603-610