作　　者： ; ; ; ;

机构地区： 南京理工大学动力工程学院瞬态物理国家重点实验室

出　　处： 《船舶力学》 2011年第11期1210-1216,共7页

摘　　要： 电磁场在导电的流体中产生的Lorentz力可以有效地改变流体边界层的结构,从而实现对流场的控制。基于电磁场和Lorentz力的基本方程,对由电极和磁极按一定规律排列形成的平板和圆柱状物体的电磁场空间分布,以及将其置于流动的弱电介质溶液时所形成的Lorentz力的空间分布进行了数值研究,并对Lorentz力的衰减规律、渗透深度和脉动程度进行了讨论。根据Lorentz力的数值结果,还对电磁场中的流动现象进行了数值计算,揭示了Lorentz力对圆柱绕流的控制过程。 The Lorentz forces generated by electromagnetic fields in the electrolyte solution may modify the structures of the flow boundary layer effectively and therefore it can be used to realize flow controls.Based on the equations of magnetic and electric fields and the formula of Lorentz force,the electromagnetic fields induced by an actuator with flat or cylindrical shape in a moving low-conducting electrolyte,consisting of a specific array of electrodes and permanent magnets were investigated numerically and the distributions of Lorentz forces were calculated also.According to the calculating results,the attenuation,effective depth and fluctuation of Lorentz force in the flow field were discussed.The numerical investigations on the wake of a cylinder covered with electro-magnetic actuators were performed and the evolutional processes of wake control by Lorentz forces were described.

关 键 词： 电磁场 力 流体控制 圆柱绕流

领　　域： [理学] [理学]