基于扇翼机翼升推力机理的吹气机翼研究

Research on blowing wing based on lift and thrust mechanism of fanwing wing

基于对扇翼飞行器升推力产生机理的数值计算与分析,提出了一种扇翼飞行器机翼的替代方案——吹气机翼。分析了扇翼机翼升推力的产生机理并在扇翼机翼翼型的基础上构建了吹气机翼翼型。建立了两种机翼翼型的数值计算方法,通过对比相对静压分布曲线、速度云图和压力云图,证明了吹气机翼具有与扇翼机翼一样的升推力产生方式,即涡致升推力的形成机制。通过将横流风扇加速后气流流速定义为吹气机翼吹气速度,对比了两种机翼升推力随来流速度和迎角的变化关系。结果表明:两种机翼的升推力变化趋势基本一致,仅在迎角大于20°时,吹气机翼推力值相较扇翼机翼损失了近5倍。总体而言,在常规飞行状态下,吹气机翼能够替代扇翼机翼,为相关飞行器的增升和优化设计提供了一种思路。

Based on the numerical calculation and analysis of the mechanism of the lift and thrust force of the fan wing aircraft,a scheme for the wing of fanwing aircraft-blowing wing was presented.The mechanism of the lift force of the wing was analyzed and the blowing wing model was established.The numerical calculation method of the wing was established and a numerical example was verified.It was proved that the blowing wing had the same vortex induced lift and thrust mode as that of the fanwing by comparing the relative static pressure distribution curve,velocity nephogram and pressure nephogram.The blow up speed of a blowing wing was defined and the relationship between lift and thrust of two wings with flow speed and angle of attack was compared.The result indicated that when the angle of attack was greater than 20 degrees,the thrust of the blowing wing was nearly 5 times less than that of the fan wing.Under normal flight conditions,the lift and thrust force of the blowing wing is similar to the fan wing,which can be replaced.It provides an idea forthe optimizing design and lift enhancement of aircraft.