CAJ | 학술논문

针对悬停状态中小型飞行器气动性能，考虑桨尖涡对飞行器桨叶桨尖的影响，分析了不同形状桨尖桨叶气动特性及其变化规律。尖削桨尖旋翼可有效削弱桨尖涡，从而降低旋翼的阻力距。桨尖涡导致桨尖处下洗速度减小，使桨尖处桨叶截面翼型的实际迎角增大。随着转速的提高，桨尖雷诺数的增大，尖削桨尖的优势才逐渐体现。
침대현정상태중소형비행기기동성능，고필장첨와대비행기장협장첨적영향，분석료불동형상장첨장협기동특성급기변화규률。첨삭장첨선익가유효삭약장첨와，종이강저선익적조력거。장첨와도치장첨처하세속도감소，사장첨처장협절면익형적실제영각증대。수착전속적제고，장첨뢰낙수적증대，첨삭장첨적우세재축점체현。
To improve aerodynamic performance of small and medium rotor in hover, considering the influence of paddle blade turbulence, the aerodynamic performance and change ruler of different paddle blade tip shape were analyzed. The paddle blade turbulence can be re-duced by sharpening paddle blade and the resisting moment of rotor in hovering. The turbulence reduces downwash speed in the blade tip and enlarges angle of attack of paddle blade section. Along with increase of rotation speed and Reynolds number, the superiority of sharp-ened paddle blade is clear.