基于非结构动网格的多体分离数值仿真研究

Simulation of unsteady multi-body flowfield involving relative movement based on unstructured mesh

发展了一种新的动网格弹性变形方法。将非结构动网格技术与六自由度运动方程相结合,应用于察/打一体无人机机载武器自由投放问题。求解非定常Euler方程时引入GMRES隐式方法,模拟了无人机平台的航空炸弹投放过程,获得了包括弹体空间轨迹和受力情况等在内丰富的运动信息,确定了投放过程中载机的安全性。通过算例,证明了本文方法的有效性和合理性,并且验证了本文仿真条件下载机的安全性。

The thesis develops a new method to take value of stiff coefficient in spring,and integrated un- structured dynamical mesh with 6Dof motion, to calculate unsteady flow between R/S UAV and lunched weapon. GMRES implicit method was implored to solve unsteady Euler flow. Major trends of the separation are captured, and the security of R/SUAV at the transition process is also confirmed.