基于翼尖涡物理特征的诱导阻力减阻机制实验研究  

Experimental study on drag-reduction mechanisms based on the physical characteristic of tip vortex

作　　者：黄文涛 向阳[1] 王笑 刘洪[1] 顾定一 Huang Wentao;Xiang Yang;Wang Xiao;Liu Hong;Gu Dingyi(School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240? China)

机构地区：[1]上海交通大学航空航天学院,上海200240

出　　处：《实验流体力学》2017年第5期53-59,共7页Journal of Experiments in Fluid Mechanics

基　　金：973计划项目"大型客机减阻机理和方法研究"(2014CB744802)

摘　　要：本文通过风洞实验研究了翼尖涡的物理特征以及诱导阻力的减阻机制。实验中利用3DPIV(三维粒子图像测速技术)技术得到了翼尖涡的物理特征,并基于本文提出并设计的翼尖气动力测量装置,得到了机翼翼尖处的诱导阻力。实验结果表明,机翼翼尖涡的无量纲环量会随机翼迎角及风速的增大而增大。翼尖涡无量纲环量的减小以及翼尖涡与机翼之间距离的增大都会引起诱导阻力的减小。具体而言,通过抑制翼尖涡的无量纲环量,增加翼尖涡与主机翼之间的距离,减小翼尖涡与机翼之间的相互作用,实现机翼翼尖诱导阻力的减阻。The drag-reduction mechanisms based on the physical characteristic of the tip vor-tex are investigated through experiments in the wind tunnel.Through3DPIV(3D Particle Image Velocimetry)experiments,the physical characteristic of tip vortex is obtained,and the induced drag of wing is calculated based on the aerodynamic force measurement setup of wingtip proposed in this paper.Experimental results show that the non-dimensional circulation of the tip vortex in-creases with the increasing angle of attack and the wind speed.Meanwhile,with the decrease of the non-dimension circulation of the tip vortex or the increase of the spacing between the wing and the tip vortex?the induced drag becomes smaller and smaller.Specifically?the induced drag reduction can be achieved by inhibiting the non-dimensional intensity of the tip vortex?which weakens the interaction between the main wing and the tip vortex.

关 键 词：翼尖涡 物理特征 诱导阻力 环量 减阻 

分 类 号：O355[理学—流体力学]