Construction of "Numerical Airplane" and "Numerical Vehicle"-A study on unified simulation of fluid dynamics and flight dynamics

建立了“数字飞机”和“数字飞行器”这两个统一的流体力学和飞行力学仿真系统。作为一种基本的逼近方法，本文提出了移动计算域（MCD）方法。MCD方法根据飞机内部的运动对计算区域进行平移，可以不受计算区域大小的限制地模拟飞行中飞机的绕流场。本文对飞机从起飞到爬升、巡航、倾斜转弯、下降、着陆的整个飞行过程进行了完整、连续的仿真。将流体动力学与飞行动力学之间的弱耦合作用应用于流体/飞行动力学统一仿真。

"Numerical Airplane" and "Numerical Vehicle", which are unified simulation systems of fluid dynamics and flight dynamics, have been constructed. As a basic method of approach," Moving Computational Domain(MCD)"method was proposed in this study. The MCD method is able to simulate a flow field around flying airplane without a limitation of the size of computational region by translating computational domain itself according to the motion of the airplane inside. A whole of flight, from taking-off to climbing, cruising, banked-turn, descending and finally landing, has been completely and continuously simulated in this study. The weak-coupled interaction between fluid dynamics and flight dynamics has been applied in this unified fluid/flight dynamics simulation.