类升力体外形俯仰阻尼特性数值研究  

Numerical study of damping-in-pitch characteristics for liftbody-type

作　　者：刘伟[1] 牟斌[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《空气动力学学报》2001年第3期331-337,共7页Acta Aerodynamica Sinica

基　　金："8 6 3"航天高技术青年基金资助项目 (86 3 2 .98.6 )

摘　　要：采用有限差分方法求解薄层近似的非定常Navier Stokes方程 ,定常流场采用交替方向隐式分解的NND格式 ,非定常流场采用四步Runge Kutta方法 ,在保证时、空二阶精度前提下引入变系数残值光顺技术提高非定常流场计算效率 ,复杂带翼外形的空间网格通过求解抛物化的椭圆型方程生成。The unsteady TLNS equations were solved by the finite difference method. Steady flow fields were solved by alternating direction implicit NND scheme. Unsteady flow fields were solved by four stage Runge Kutta method,and the computational efficiency was increased rapidly by appling implicit varied coefficient residual smoothing technology. The space grids of complex wing-shape were generated by solving parabolic partial differential equations. Finally,the damping in pitch derivatives of blunt cone and liftbody type were given under Etkin's theory.

关 键 词：Navier-Stokes方程 非定常流动 数值模拟 俯仰阻尼导数 类升力体外形 动导数 Etkin理论 可重复使用运载器 RLV X-33缩比验证机 飞机 

分 类 号：V211.24[航空宇航科学与技术—航空宇航推进理论与工程] V211.3