CAJ | 학술논문

针对两种不同气动布局的前、后掠翼无人机,采用CFD/CSD松耦合方法,对弹性飞行器承受过载为10和20情况下的气动特性与刚性飞行器进行了对比分析.计算结果表明,与刚性飞行器假设情况相比,考虑过载作用下的弹性前掠翼飞机升力减小、阻力减小;而弹性后掠翼飞机的升力增大、阻力增大;两种气动布局的弹性飞行器与刚性情况相比,升阻比都略微增大,而且俯仰力矩系数明显增大.这对于飞行器纵向气动操纵特性会产生较大影响,同时也说明在大机动飞行过程中计入飞行器的弹性变形是非常必要的.
침대량충불동기동포국적전、후략익무인궤,채용CFD/CSD송우합방법,대탄성비행기승수과재위10화20정황하적기동특성여강성비행기진행료대비분석.계산결과표명,여강성비행기가설정황상비,고필과재작용하적탄성전략익비궤승력감소、조력감소;이탄성후략익비궤적승력증대、조력증대;량충기동포국적탄성비행기여강성정황상비,승조비도략미증대,이차부앙력구계수명현증대.저대우비행기종향기동조종특성회산생교대영향,동시야설명재대궤동비행과정중계입비행기적탄성변형시비상필요적.
A CFD/CSD loosely-coupled methodology was employed in the analysis of nonlinear areoelastic behavior of two kinds of UAV in maneuvering flight. Using this approach, the forward-swept and backward-swept elastic aerocraft in the 10g and 20g g-load statuses were investigated and compared with the rigid body. The final result shows that when taking the elasticity into consideration the lift and drag of the forward-swept decrease, but for the backward-swept obviously increase, the lift-drag ratio for both configurations increases slightly and the pitch moment coefficient is remarkable increase, which affect the longitudinal aerodynamic performance of UAV significantly. The result also shows considering the effect of the deformation of elastic aerocraft which is in the maneuvering flight is very necessary.