厚度对扑动平板气动特性的影响分析

Effect of Thickness on Flapping Flat Plates Characteristics

自然界中很多飞鸟采用扑翼飞行方式。利用二维平板模拟翅膀扑动运动,研究厚度对平板气动性能的影响。在给定的雷诺数Re、斯特劳哈数St和运动形式下,分析平板与涡的相互作用。研究发现,厚度的改变影响了涡脱落的时间以及脱落涡的强度。在一定厚度变化范围内,平板升力系数和推力系数幅值随厚度的增加而降低。

In this paper,2D flat plate is used to simulate the flapping motion of the wings and research about the effect of thickness on the characteristics of the flat plate.Under the condition of given Reynolds number,Strouhal number and the motion equation,the interaction of the vortex and the flat plate is analyzed in this paper.It is found that the thickness can change the timing of vortex shedding and the strength of the vortex.Within certain ranges,the lift and thrust coefficient amplitude of flat plate decreases as the thickness raises.