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应用有了巨大的增长。 这源于20世纪80年代和90年代在大学中开发的数值分析技术的不断进步，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。 虽然计算流体动力学技术通常用于求解巡航、起飞和着陆状态下飞机的绕流问题，但仍需开发和验证能扩大计算流体动力学技术适用范围的方法。 特别是，该项目将集中在复杂的配置时出现的飞机操纵面在飞行机动过程中使用的非定常流。 这种方法有两个方面，一个侧重于开发适用于初步设计研究的低逼真度模型，另一个侧重于在飞机研制的详细设计阶段使用的高保真度模型。 将分析带有副翼、扰流片或水平安定面的飞机拓扑结构，并分析增升系统的展开和收起。 流动条件将包括亚音速和跨音速范围内的非对称和非定常飞行条件。 粘性效应将被纳入建模。 该项目还将研究将这些方法用于高柔性机翼飞机设计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（非常灵活的飞机的航空结构设计，验证和控制）中的国际专家的合作，该项目也专注于在低和高保真领域使用计算方法。 这提供了一个独特的机会，学习新颖的飞机设计概念，提高最先进的计算技术，为我们的行业竞争力，并使我们的学生接触到跨国研发合作环境。

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.