【作者】 刘会星； 周本谋； 刘宗凯； 单伟； 程峰；

【Author】 LIU Hui-xing,ZHOU Ben-mou,LIU Zong-kai,SHAN Wei,CHENG Feng (Key Lab of Transient Physics,Nanjing University of Science and Technology,Nanjing,Jiangsu 210094,China)

【机构】 南京理工大学瞬态物理重点实验室；

【摘要】 采用电磁体积力对翼型绕流流体边界层进行控制,从而达到控制翼型绕流流场结构和改善翼型流体动力学特性的目的.基于电磁场和流体力学的基本控制方程,采用数值模拟方法对置于流动的弱电介质溶液中(如海水),不同电磁极板宽度产生的电磁力空间衰减规律和渗透深度进行了分析,分析了不同极板宽度电磁激活板产生的电磁力对翼型绕流的控制效果;针对翼型表面电磁激活板的不同包覆范围而形成不同电磁力分布的情况,进行翼型绕流的控制优化研究,得到了以消涡和控制流体边界层分离为目的且控制效果最好的电磁力分布参数.更多还原

【Abstract】 The flow field structure of flow around hydrofoil and the fluid dynamics of hydrofoil may be modified by electromagnetic body force.Based on the basic governing equations of electromagnetic field and hydrodynamics,by utilizing numerical simulation methods,the attenuation and fluctuation characteristics of electromagnetic fields on electro-magnetic(EM) actuator with different electromagnetic pole width were discussed.Also the distribution of electromagnetic forces(lorentz force) which are generated in fluid boundary layer in electrolyte (such as seawater) have been discusssed.The lorentz force’s controlling effects are showed rationally in the hydrofoil fluid boundary layer modification process.Uusing bedded scales of electromagnetic fields to produce corresponding electromagnetic force to control of the flow around hydrofoil,there have being identified the best electromagnetic force distribution can be realized,Which leads to the optimal suppression of vortex and the boundary layer separation.更多还原