翼型襟翼受力的稳定性分析

The stability of the force of flaps

采用数值求解N-S方程的方法,用DES湍流模型求解襟翼高度对风力机专用翼型DU95-W-180气动性能的影响。结果表明,添加一定高度的襟翼后,翼型的受力出现波动现象,而且波动幅度随着襟翼高度的增加而增大,进一步研究引起该现象的原因发现,添加襟翼的翼型其失速旋涡的脱落过程会引起翼型周围压力的周期性变化,进而导致翼型受力出现波动现象。

DES turbulence model was used to solve the influence of flap height to the aerodynamic performance of wind dedicated DU95-W-180 airfoil by solving NS equations with numerical methods.The results showed that added a certain height of the flap,the airfoil force appears fluctuate,and the fluctuation range increased with the hight of the flap.The further studies to the reasons causing the phenomenon found that add the flaps,its stall vortex shedding process can cause cyclical changes in pressure around the airfoil,which led to the phenomenon of airfoil force fluctuations.