摘要
采用数值模拟方法对潜射导弹垂直发射上升过程重力场中非定常空泡流进行了研究。使用动网格技术,结合求解考虑质量输运空化模型的混合介质RANS方程,实现了弹体边界运动与汽水流场的流-固耦合问题求解,并将仿真结果与实验数据进行对比分析,二者具有较好的一致性,验证了数值求解方法的正确性和有效性。以此为基础,数值模拟了重力影响下的潜射导弹垂直发射水下运动过程,给出了导弹阻力系数与空化数之间的关系,分析了肩空泡对导弹的流体动力和出水速度的影响。
In this paper, the unsteady cavitating flow in a longitudinal gravity force field was researched by using numerical simulation method during vertical launch submarine missile rising. A dynamic mesh technique is adopted, combined with considering transport RANS equations of liquid mass fractions, to solve the problem of missile motion coupled with the flow field of mixture medium. The numerical results are perfectly consistent to the experimental data, thus the efficiency of the numerical method is proved. Based on the efforts mentioned above, the underwater motion process of a submarine vertically launched missile was simulated, and the relationship between the drag coefficient of the missile and cavity number was given. At last the analysis for the effect of the partial cavity on the hydrodynamics and water exiting speed was achieved.
出处
《工程力学》
EI
CSCD
北大核心
2009年第7期251-256,共6页
Engineering Mechanics
关键词
流-固耦合
垂直发射
肩空化
流体动力动网格
fluid-solid coupling
vertical launch
partial cavity, hydrodynamic
dynamic mesh
