地效飞行器近波浪地面大迎角飞行分离流动数值研究  

Numerical research on separated flow around a WIG craft flying over wavy ground at high incidence angle

作　　者：屈秋林[1] 刘沛清[1] 秦绪国[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100083

出　　处：《空气动力学学报》2008年第2期221-226,共6页Acta Aerodynamica Sinica

基　　金：航空支撑基金(41801110202)

摘　　要：数值模拟了地效飞行器近波浪地面大迎角飞行的分离流场,研究飞行高度和地面波浪对气动性能的影响。使用Fluent软件求解非定常可压缩流动的质量加权平均NS方程和标准k-ε湍流模型,使用滑移网格处理地效飞行器和波浪地面间的相对运动。飞行高度降低,机翼上翼面的附着流动转化为分离流动。波浪地面飞行气动力平均值和水平地面飞行气动力随飞行高度变化的规律完全一致。The separated flow fields around a WIG（Wing In Ground） craft flying over wavy ground at high angle of attack are simulated numerically, in order to investigate the effect of flight height and wave on its aerodynamics. The Farve-averaged NS equations of unsteady compressible flow and the standard k-ε turbulence model are solved by Fluent software. Sliding meshes are applied to treat the relative motion between the WIG craft and wavy ground. When the flight height decreases, the attached flow on top surfaces of the WIG craft＇ s wings becomes separated flow. The mean values of aerodynamic forces over wavy ground and aerodynamic forces over level ground vary with the flight height in similar pattern.

关 键 词：地效飞行器 波浪地面 分离流动 气动性能 数值模拟 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]