三翼面流态控制水洞试验研究

在水洞中研究了三翼面流动分离和三翼面布局飞机大迎角的流动机理.以三角翼为基础,近距耦合鸭式布局作为基本研究平台,引入机身边条并进行优化选型,采用空间流态显示与测力技术,研究这种三翼面流动的各种现象,并探讨了此布局对机翼流动的控制机理.研究表明:此布局使集中涡的生成迎角、涡核迎角、涡核后掠角、涡核破裂位置等旋涡特征参数明显改善.三翼面布局对机翼流动的控制机理可归纳为对流动产生的"加速"、"抑制"和"排挤"效应.

Investigation on flow control of triplane in the water tunnel

The flow visualization and measurement technology were used to study the flow separation,development of mass vortex and flow control mechanism of triplane at large angle of attack in a water tunnel.This triplane with a well-chosen fuselage strake is based on a close-coupled canard delta-wings aircraft.The investigation indicates that this new configuration can reduce the angle of attack evidently when the leading-edge vortex appears,decrease the angle of attack and the sweepback angle of vortex core and push back the position of break point.The conclusion of the flow control of this new configuration could be deduced to the effect of "acceleration","suppression","squeeze" to the flow.