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Experimental Research on Lift up and Drag Reduction Effect of Streamwise Travelling Wave Wall

机译:流向行波墙提举减阻效果的试验研究

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摘要

Travelling wave wall used for Micro Air Vehicle flow control is studied to find out its drag reduction effect. Aerodynamic characteristics of the airfoil with and without a streamwise travelling wave on its surface are calculated. The interrelationship is also analyzed among lift, drag and ratio of motion phase speed to the external flow velocity. The flexible airfoil that can generate streamwise travelling waves is realized via electromagnetic coil actuation. Thirty-six coils are placed streamwisely under heat shrink film and magnets producing magnetic field are placed under coils. Every single coil is controlled by current to move vertically in harmonic motion with 30 degrees phase difference between adjacent ones. So heat shrink film is actuated, and streamwise travelling wave is generated. Meanwhile, a prototype is designed and tested in wind tunnel. The experimental aerodynamic data proves that streamwise traveling wave airfoil can increase lift and reduce air drag.
机译:研究了用于微型飞行器流量控制的行波壁,以发现其减阻效果。计算了在其表面上有和没有流向传播波的翼型的空气动力学特性。还分析了升力,阻力和运动相速度与外部流速之比之间的相互关系。可通过电磁线圈致动来实现可产生沿行波传播的柔性翼型。将36个线圈流向放置在热收缩膜下方,将产生磁场的磁体放置在线圈下方。每个线圈都受电流控制,以谐波运动垂直移动,相邻线圈之间相差30度。因此,热收缩膜被致动,并产生沿流的行波。同时,在风洞中设计并测试了原型。实验空气动力学数据证明,沿流行波的翼型可以增加升力并减少空气阻力。

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