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

在过去的十年里，计算流体动力学(CFD)在飞机设计和分析中的使用出现了巨大的增长。这源于大学在20世纪80年代的S和90年代的S时期开发的数值分析技术的不断进步，这些技术最终成熟为现在用于航空航天行业的准确、高效和强大的软件。虽然CFD技术通常用于解决巡航、起飞和着陆布局中的飞机绕流问题，但仍需要开发和验证方法来扩大CFD技术的适用范围。特别是，该项目将专注于复杂构型上的非定常流动，这种非定常流动是在飞行操纵期间使用飞机操纵面时产生的。这种方法将有两个方面，一个是开发适用于初步设计研究的低保真模型，另一个是在飞机开发的详细设计阶段使用的高保真模型。带有副翼、扰流板或水平稳定器的飞机拓扑将在部署和收回高升力系统的情况下进行分析。流动条件将包括亚音速和跨音速区域的不对称和非定常飞行条件。粘性效应将被纳入建模中。该项目还将研究将这些方法用于高度灵活的机翼飞机设计的气动伺服弹性计算的可行性。这提供了一个独特的机会来学习新的飞机设计概念，增加我们行业竞争力的计算技术的最新水平，并让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.