双时间法在弹丸非定常流场模拟中的应用  

Numerical Simulation of Unsteady Flowfield over Projectile by Dual-time Stepping Method

作　　者：高旭东[1] 武晓松[1] 王晓鸣[1] 

机构地区：[1]南京理工大学,江苏南京210094

出　　处：《弹箭与制导学报》2004年第S7期157-160,共4页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：采用Jameson提出的双时间推进方法改进的隐式有限体积TVD数值格式,对有攻角高速旋转SOCBT弹丸非定常流场进行了数值模拟。计算结果表明:流场在经过约一个旋转周期之后形成了动态稳定状态,弹丸表面压力呈现出稳定的周期性波动,整个绕流场表现为非定常周期性变化,计算得到的马格努斯力系数与试验值的对比令人满意,说明该格式是进行弹箭非定常流场数值模拟的有效方法。Implicit finite volume TVD schemes improved by the dual-time stepping method are applied to numerically simulate unsteady flowfield over high-speed spinning SOCBT projectile with attack angle. The result of flowfield shows periodical stabilization after one period of spinning. The surface pressure of projectiles waves periodically. The flowfield shows unsteady and periodically. And the Magnus force coefficient is in excellent agreement with the experiment data. It is proved that the present method is very effective for simulation of unsteady flow over projectiles.

关 键 词：有限体积TVD格式 双时间推进法 非定常流场 弹丸 

分 类 号：TJ410.6[兵器科学与技术—火炮、自动武器与弹药工程]