Multi-fidelity computational fluid dynamics for aircraft stability and control aerodynamics

在过去的十年中，计算流体动力学（CFD）在飞机设计和分析中的应用得到了极大的发展。这源于20世纪80年代和90年代大学发展的数值分析技术的不断进步，这些技术最终成熟为现在航空航天工业中使用的准确，高效和强大的软件。虽然CFD技术通常用于解决飞机在巡航、起飞和着陆配置中的流动问题，但仍然需要开发和验证方法，以增加CFD技术的适用性范围。特别是，该项目将侧重于在飞行演习中使用飞机控制面时出现的复杂配置的非定常流。这种方法将是双重的，一种侧重于开发适合用于初步设计研究的低保真模型，另一种侧重于在飞机开发的详细设计阶段使用的高保真模型。在高升力系统展开和收缩的情况下，将分析带有副翼、扰流板或水平稳定器的飞机拓扑结构。流动条件将包括不对称和非定常的亚音速和跨音速飞行条件。粘性效果将被纳入建模。该项目还将研究将这些方法应用于设计高柔性机翼飞机的气动伺服弹性计算的可行性。该项目将受益于与欧洲框架7项目ADVICE（非常灵活飞机的航空结构设计、验证和控制）内的国际专家的合作，也将重点放在低保真度和高保真度领域的计算方法的使用上。这提供了一个独特的机会来学习新的飞机设计概念，提高我们行业竞争力的最先进的计算技术，并使我们的学生接触到多国研发合作环境。

The past decade has seen a tremendous rise in the use of Computational Fluid Dynamics (CFD) for aircraft design and analysis. This stems from the constant progression of numerical analysis techniques developed in Universities in the 1980's and 1990's that has finally matured into accurate, efficient and robust software now used within the aerospace industries. While CFD techniques are routinely used to solve flows over aircraft in the cruise, take-off and landing configurations, there remains to develop and validate methods that will increase the range of applicability of CFD techniques. In particular, the project will focus on unsteady flows over complex configurations that arise when aircraft control surfaces are used during flight manoeuvres. The approach will be twofold, one focusing on development of low-fidelity models suitable for used within preliminary design studies, the other focusing on high-fidelity models used during the detail design phase of aircraft developments. Aircraft topologies with ailerons, spoilers or horizontal stabilizers will be analysed with high-lift systems deployed and retracted. Flow conditions will include asymmetrical as well as unsteady flight conditions in subsonic and transonic regimes. Viscous effects will be incorporated in the modelling. The project will also examine the feasibility of implementing these methods for use into aero-servo-elasticity calculations for the design of highly flexible wing aircraft. The project will benefit from a collaboration with international experts within a European Framework 7 program named ADVICE (Aero-structural Design, Validation and Control of very flexible aircraft), also focused on the use of computational methods in low and high fidelity realms. This provides a unique opportunity to study novel aircraft design concepts, increase the state-of-the-art in computational techniques for our industries competitiveness, and to expose our students to multi-national R&D collaborative environments.