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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Investigation of the flight behavior of a flare-stabilized projectile using 6DoF simulations coupled with CFD
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Investigation of the flight behavior of a flare-stabilized projectile using 6DoF simulations coupled with CFD

机译：使用6DOF模拟与CFD相结合的爆发稳定射弹的飞行行为调查

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Purpose - The present work aims to investigate the capabilities of accurately predicting the six-degrees-of-freedom (6D0F) trajectory and the flight behavior of a flare-stabilized projectile using computational fluid dynamics (CFD) and rigid body dynamics (RED) methods. Design/methodology/approach - Two different approaches are compared for calculating the trajectory. First, the complete matrix of static and dynamic aerodynamic coefficients for the projectile is determined using static and dynamic CFD methods. This discrete database and the data extracted from free-flight experiments are used to simulate flight trajectories with an in-house developed 6D0F solver. Second, the trajectories are simulated solving the 6D0F motion equations directly coupled with time resolved CFD methods. Findings - Virtual fly-out simulations using RBD/CFD coupled simulation methods well reproduce the motion behavior shown by the experimental free-flight data. However, using the discrete database of aerodynamic coefficients derived from CFD simulations shows a slightly different flight behavior. Originality/value - A discrepancy between CFD 6D0F/RBD simulations and results obtained by the MATLAB 6DoF-solver based on discrete CFD data matrices is shown. It is assumed that not all dynamic effects on the aerodynamics of the projectile are captured by the determination of the force and moment coefficients with CFD simulations based on the classical aerodynamic coefficient decomposition.
机译：目的 - 目前的工作旨在调查使用计算流体动力学（CFD）和刚性体动力学（红色）方法准确地预测六度自由度（6D0F）轨迹和飞行稳定射弹的飞行行为的能力。设计/方法/方法 - 比较两种不同的方法，以计算轨迹。首先，使用静态和动态CFD方法确定射弹的静态和动态空气动力系数的完整矩阵。这种离散数据库和从自由飞行实验中提取的数据用于模拟与内部开发的6d0f求解器的飞行轨迹。其次，模拟轨迹求解与时间分辨的CFD方法直接耦合的6d0f运动方程。发现 - 使用RBD / CFD耦合仿真方法的虚拟飞出模拟良好再现实验自由数据所示的运动行为。然而，使用源自CFD仿真的离散数据库显示出略有不同的飞行行为。原始性/值 - 示出了基于离散CFD数据矩阵的MATLAB 6dof-solver获得的CFD 6d0f / RBD模拟和结果之间的差异。假设不是基于经典空气动力学系数分解的CFD仿真的力和时刻系数确定射弹的所有动态效果都是捕获的射弹的空气动力学。

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