后缘锯齿襟翼对翼型气动特性的影响研究

Research on effect of sawtooth trailing edge flap on aerodynamic characteristics of airfoil

针对在翼型后缘增加锯齿襟翼与格尼襟翼的差异性,以及二者对翼型的空气动力特性有何改善等问题,在某民用运输机机翼翼型下表面后缘处增加锯齿襟翼,对其进行了空气动力特性试验和计算。结果表明,增加一定高度的后缘锯齿襟翼,能够减弱和改变翼型下表面后缘处气流的流动,从而减少和改变翼型下表面尾涡的涡量和涡量变化率,达到增加翼型升力、减小翼型阻力的目的。

For the difference between adding serrated flap and Gurney flap in the airfoil trailing edge,improvement of aerodynamic characteristics on airfoil made by the two,sawtooth flaps is added on the trailing edge of the wing airfoil lower surface of a civil transport aircraft and the aerodynamic characteristics are calculated and tested. The results show,by adding a certain height of sawtooth trailing edge flaps,movement of the flow at the trailing edge of the lower surface can be reduced and changed,thus reducing and changing the vorticity and vorticity change rate of the airfoil lower surface,increasing the lift and reducing the airfoil drag.