Calculation of Trajectory of High-speed Spinning Projectile Based on Computational Fluid Dynamics/Rigid Body Dynamics Coupling

被引：0
作者：
Zhong Y. [1 ]
Wang L. [1 ]
Wu Y. [1 ,2 ]
机构：
[1] School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu
[2] Unit 63961 of PLA, Beijing
来源：
Binggong Xuebao/Acta Armamentarii | 2020年 / 41卷 / 06期
关键词：
Computational fluid dynamics; Coupling calculation; High-speed spinning projectile; Rigid-body dynamics; Trajectory;
D O I：
10.3969/j.issn.1000-1093.2020.06.005
中图分类号：
学科分类号：
摘要：
To study the real flight trajectory of high-speed spinning projectile, a computational fluid dynamics/rigid body dynamics (CFD/RBD) couping computational methodology is developed using improved simple low-dissipation advection upstream splitting method (SLAU2), dual time-stepping method and Spalart-Allmaras (S-A) turbulence model based on the ideas of adding the motion of projectile axis to the surfaces of control volumes and adding the spin motion to the wall boundary. A flow model with ALE form is established. An arbitrary Lagrangian-Eulerian (ALE) flow model is established. A coupled mathematical model of the projectile motion and the surfaces of control volume motion is developed, and the simultaneous calculation of flow equations and trajectory equations based on 4th order Runge-Kutta method is achieved. The research results show that the aerodynamic coupling method and time step have great influence on the trajectory coupling calculation results. The trajectory of M549 spinning projectile at 0.5 ms timesteps was simulated using the tighting coupling method. The simulated results are basically consistent with the results calculated by the aerodynamic model. The trajectory simulation result of a spin stabilized two-dimensional trajectory correction projectile shows that the characteristic of that rising moment causes the projectile nose drop, which is consistent with the result in Ref. [29]. © 2020, Editorial Board of Acta Armamentarii. All right reserved.
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页码：1085 / 1095
页数：10
相关论文
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