摘要
本文对两个机翼等速上仰及下俯的动态分离流动特性在水槽中进行了流态研究。结果表明，动态滞后效应与折算频率关系很大。转轴位置对动态滞后的影响与增加上仰角速度的作用有某种相仿的效应。机翼的初始迎角对动态流动特性有不可忽视的“遗传”效应。
The dynamic separated flow behaviours on two wings,a trapezium wing and a delta wing, were studied by the hydrogen bubbles visualizations in a water channel during ramp pitching up and down at the range of angles of attack 0～90°. The very fine platinum wires were arranged along the leading edges of wings and generated the hydrogen bubbles to visualize the dynamic vortices behaviours.The results indicatedthat the hysteresis of leading edge vortices depended strongly on theramp rates,as well know, otherwise the pivot position played an impor-tant role for the dynamic hystersis, and finally the“ heredity” effect ofthe starting pitching angle of attack must be noticed for hysteresischaracteristics.
出处
《空气动力学学报》
CSCD
北大核心
1995年第4期452-456,共5页
Acta Aerodynamica Sinica
关键词
机翼
分离流
动态特性
wings,separated flow, dynamic characteristics.
