临界区雷诺数下翼型流场电磁力控制的脱体涡模拟  

Detached-eddy simulation of electromagnetic controlled flow around a hydrofoil under critical Reynolds number

作　　者：张光林[1] 尤云祥[1] 胡天群[1] 赵良明[2] 王磊[2] 周友明[2] 陈虹[2] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240 [2]中船重工集团公司第719研究所,武汉430064

出　　处：《水动力学研究与进展（A辑）》2012年第3期311-320,共10页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金(11072153)~~

摘　　要：利用Maxwell方程直接数值计算表面包覆电极与磁极翼型产生的三维Lorentz力分布,将其加入到流体控制方程的动量方程中,采用脱体涡模拟方法对临界区雷诺数下受Lorentz力作用下翼型绕流场进行数值模拟,研究分析了电磁力作用系数和攻角对翼型绕流场结构及其升阻力系数的影响机理和规律。结果表明,Lorentz力可以有效地改善翼型周围的流场结构,达到减阻、增升、消涡以及延缓和抑制其失速的目的,因此是翼型的一种有效流动控制手段。Three-dimensional distribution of the Lorentz force around a hydrofoil coated with electrodes and permanent magnets is obtained by solving Maxwell equation system. Numerical simulations for flow around such a hydrofoil due to the Lorentz force are performed by using the detached-eddy simulation method where the Lorentz force is added to the momentum equation of flow governing equation system. The effects of the electromagnetic interaction parameter and attack angle on the flow structures around the hydrofoil as well as the lift and drag coefficients are investigated. The results show that the Lorentz force applied on the hydrofoil can effectively improve the flow structures around the hydrofoil and suppress its vortex. Stall can be suppressed or delayed for higher attack angles resulting in an increase of the lift and a decrease for the total drag of the hydrofoil. Therefore, the electromagnetic control is an effective way to realize flow controls of hydrofoils.

关 键 词：翼型绕流 电磁力 流动控制 脱体涡模拟 

分 类 号：O35[理学—流体力学]