用电磁体积力的翼型绕流控制实验研究

研究了电磁体积力控制弱电解质溶液流动边界层的基本原理以及分析了翼型电磁激活板的绕流实验结果.电磁体积力控制弱电解质溶液流动边界层是磁场和电流相互作用产生电磁体积力作用在流体上的结果.实验结果表明:电磁力作用改变了翼型表面的流体边界层的结构,其作用与改变翼型的迎角类似.加正向电磁力,相当于减小翼型的迎角,可以抑制流动分离,消除涡街;而反向电磁力则相当于增大迎角,在翼型的背风面产生大尺度的流动分离,流场中出现复杂的旋涡结构.

Experiments of the flow field structure control around an aerofoil based on electromagnetic force

This paper is concemed about the basic theory of weakly conducting fluid boundary layer control by electromagnetic forces and the experimental results of flow around an aerofoil electromagnetic actuator the vector product from the magnetic induction B and the current density influencing the flow of weakly con- ducting fluid. Analyzing the experimental results, we find the function of electromagnetic force changes the aerofoil external boundary layer frame, just similar to changing the attack angle of aerofoil. Adding positive electromagnetic force is similar to decreasing the attack angle of aerofoil that can restrain flow separation and e- liminate street vortex. Adding the negative electromagnetic force equals to increasing the attack angle of aerofoil that can produce big scale flow separation at the leeward of aerofoil and complicated vortex structure.