Advanced Aerodynamic Modelling for Flight Dynamics Applications

提出了一个为期三年的项目，使必要的进展，允许利用计算流体动力学的模拟飞行。飞行仿真是基于求解牛顿第二运动定律的飞行器，其各种力产生于重力和空气动力学，各种简化模型通常用于表示气动力。这些模型的生成可能需要大量的风洞测试。作为替代方案，如果能够使模拟本身足够快地执行，则可以使用计算机模拟来生成必要的数据。该提案的第一部分是开发和演示一种基于欧拉方程的非线性频域方法的数据集生成快速方法。将实施非线性频域方法，以快速生成当前飞行动力学模拟的数据集。此外，CFD模拟将用于直接提供牛顿第二定律的气动力，允许对气动力进行一般处理，而无需简化，这可能是简单方法中固有的。然而，直接耦合模拟在计算上非常昂贵，并且可能仅对于极端机动是必要的。将对这两种方法进行中度和极端机动评估。来自国防部的数据集将用于CFD预测的初步验证，然后是通用的Hawk教练机模型，最后是建议的FLAVIIR验证飞行器。将利用与克兰菲尔德的飞行动力学专家的密切合作，以确保这项工作与当前的飞行模拟实践相兼容，并最大限度地立即利用该项目的结果。该项目的费用为197，911美元。

A three year project is proposed to make the advances necessary to allow the exploitation of Computational Fluid Dynamics for the simulation of flight. Flight simulation is based on solving Newton's second law of motion for the aircraft which various forces arising from gravity and aerodynamics, Various simplified models are normally used to represent the aerodynamic forces. The generation of these models can require substantial wind tunnel testing. As an alternative it is possible that computer simulation can be used to generate the necessary data if the simulation itself can be made to execute fast enough. The first part of this proposal is to develop and demonstrate a fast method for data set generation, based on a nonlinear frequency domain method for the Euler equations. A nonlinear frequency domain method will be implemented to allow the rapid generation of datasets for current flight dynamics simulations. Further the CFD simulation will be used to directly provide the aerodynamic forces to Newton's second law, allowing a general treatment of the aerodynamic forces without the simplifications which can be inherent in simpler approaches. The directly coupled simulation is however computationally very expensive and is likely to be necessary only for extreme manoeuvres. These two approaches will be evaluated both for moderate and extreme manoeuvres. A dataset from the MoD will be used for initial validation of the CFD predictions, followed by a generic Hawk trainer model and concluding with the proposed FLAVIIR demonstrator vehicle. Close collaboration with flight dynamics experts at Cranfield will be exploited to ensure that the work is compatible with current flight simulation practice and that maximum immediate exploitation of the results of the project is made. The cost of the project is 197,911.