摘要
使用Fluent软件求解非定常可压缩流动的质量加权平均N-S方程和标准k-ε湍流模型,采用滑移网格技术数值模拟地效飞行器在波浪地面上方飞行的全机流场,研究波浪地面对气动性能的影响。在余弦波浪地面上方飞行,气动力呈现周期性,文中给出了一个周期内气动力的变化规律,分析了飞行高度和迎角对气动力平均值和气动力波动幅度的影响规律。一个周期内翼剖面的压力分布表明,波浪地面主要影响机翼下表面的压力分布,对机翼上表面的压力分布影响很小。
Aerodynamic characteristics of a WIG craft in flight close to wavy ground are investigated numerically. The Farve-averaged N-S equation of unsteady compressible flow and the standard k-ε turbulence model are solved by Fluent software. The sliding mesh is used to treat with the relative movement between the craft and the wavy ground. The aerodynamic forces of the WIG craft are periodic when it flies over the cosine-shaped ground. How do the aerodynamic forces vary with time in one period is presented. The effects of flight height and angle of attack on mean and amplitude values of the aerodynamic forces are provided. The pressure distributions of the airfoil sections in one period show that the wavy ground mainly affects the pressure on the lower surface of the wing, but affects that on the upper surface unnotably.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2007年第6期1327-1333,共7页
Acta Aeronautica et Astronautica Sinica
基金
航空支撑科技基金(04A51005)
关键词
地效飞行器
波浪地面
气动性能
压力分布
k-ε湍流模型
WIG craft
wavy ground
aerodynamic characteristic
pressure distribution
k-ε turbulence model
