摘要
在水槽中利用激光片光源及荧光素钠染色液显示方法 ,研究了圆柱、机翼与平板交接区及后掠圆柱、后掠机翼变迎角情况下的干扰流场结构、特性及参数影响规律。结果表明 ,除Re数之外模型迎角、后掠角等参数对干扰区马蹄涡特性有很大影响。研究发现后掠圆柱及后掠机翼在一定条件下存在一类既不同于马蹄涡也不同于卡门涡的空间稳定发展的三维旋涡系即背涡。讨论了干扰背涡产生的机制及其与马蹄涡的相互关系。
Experimental investigation of vortex characteristics in swept wing/body junctions has been performed with laser light sheet and sodium fluorescence dyed liquid method in the water channel of BUAA. The results show that in addition to Reynolds number, the angle of attack and the swept angle are also much important parameters that influence the vortex characteristics. It is found that in swept cylinder/plate and swept wing/plate conditions there exists a new kind of 3 D steady vortex system back vortex, which is different from the horseshoe vortex and the Karman vortex. The back vortex comes from the rear part of the junctions and extends into space. The forming mechanism of this back vortex system and its relationship with horseshoe vortex system are also discussed.
出处
《流体力学实验与测量》
EI
CSCD
2000年第2期16-20,共5页
Experiments and Measurements in Fluid Mechanics
基金
国防科技预研基金资助项目!(96J1 3A2 1 )
关键词
翼身交接区
马蹄涡
背涡
后掠角
流动结构
wing/body junctions
horseshoe vortex
back vortex
swept angle
