摘要
采用非结构网格的LU-SGS隐式算法计算三维Euler方程,数值模拟了不同马赫数以及不同攻角下某空心弹丸绕流流场,分析了流场的波系结构及其升阻力特性,计算结果表明空心弹丸的阻力系数比同口径的普通弹丸的阻力系数大约小30％,空心弹丸的阻力系数以及升力系数随攻角的变化规律与普通弹丸一致．
The implicit LU-SGS scheme based on unstructured meshes is employed to solve three-dimensional Euler equations. The flow field of a hollow projectile is numerically simulated for different Mach number and different attack angle. Complicated flow structure and its lift and drag characteristics are discussed. The numerical results indicate that the drag coefficient of a hollow projectile is smaller by about 30 percent than that of a common projectile with the same diameter, and the correlations between the drag and the lift coefficients of the hollow projectile and the attack angle are in agreement with those of the common projectile. The results are relevant to engineering designs.
出处
《力学与实践》
CSCD
北大核心
2006年第5期24-27,共4页
Mechanics in Engineering
基金
国家自然科学基金项目(10476011)资助.
