Coordination Funds

协调基金

• 批准号: 428245937
• 负责人: Dr.-Ing. Thorsten Lutz
• 金额: --
• 依托单位: Institut für Aerodynamik und Gasdynamik (IAG)
• 依托单位国家: 德国
• 项目类别: Research Units
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/428245937?language=en
• 关键词: Coordination; Funds

The aerodynamics of transport aircraft at the borders of the flight envelope are characterized by complex interactions and non-linear, transient aerodynamics. The resulting physical mechanisms are not fully understood and a prediction of aerodynamic properties, transient loads and aeroelastic behavior is a major challenge and requires the use of complex numerical models. Scale resolving methods are hardly validated for this application and need to be extended for higher Reynolds numbers in order to perform high-resolution simulations taking into account all physical effects. Apart from a lack of high resolution flow field measurements to study the underlying physical mechanisms, there are few scientifically usable and sufficiently detailed measurements of complete configurations for high, flight-relevant Reynolds numbers. The main goals of the research group 2895 are the comprehensive investigation of the unresolved physical issues in the high-speed stall of transport aircraft, the extension and qualification of numerical methods for this application and the modelling of unsteady flow and nonlinear aerodynamics with reduced order models. The local physical mechanisms and interactions must be understood to achieve a description of the aerodynamic effects for the complete configuration. The knowledge gain will be achieved by coordinated numerical and experimental studies of the flow physics in different parts of the flow field combined with corresponding investigations on a full aircraft configuration. The research group, which is organized in seven subprojects, carries out detailed studies on the buffet on the upper side of the wing, the development of the separated wake and its interaction with the tail plane. These studies will be carried out on the Airbus XRF-1 transport aircraft configuration, in which an ultra-high bypass nacelle will be integrated to study engine influences and local interactions. In order to enable measurements up to flight-relevant Reynolds numbers, the experiments will be conducted in the cryogenic wind tunnel ETW with funding from the HGF and DLR. The resulting numerical and experimental data base will be used for modelling and derivation of reduced order models and for flow physics studies. In addition, the fundamental flow phenomena will be studied numerically and experimentally by FOR 2895 on a generic tandem wing configuration at reduced Reynolds number, which allows spatially higher resolved measurements in relation to the relevant scales of the boundary layers.

飞行包膜边界上运输飞机的空气动力学的特征是复杂的相互作用和非线性的瞬态空气动力学。所产生的物理机制尚不完全了解，并且预测空气动力学特性，瞬态载荷和航空弹性行为是一个主要的挑战，需要使用复杂的数值模型。对于此应用程序，几乎无法验证比例解析方法，并且需要扩展较高的雷诺数字，以便考虑所有物理效应，以执行高分辨率模拟。除了缺乏研究基本物理机制的高分辨率流场测量值外，几乎没有科学可用的且足够详细的测量值对高，相关的雷诺数数字进行了完整的配置。研究小组2895的主要目标是对高速运输飞机中未解决的物理问题的全面研究，用于此应用的数值方法的扩展和资格以及对不稳定流动和非线性空气动力学的建模，并具有减少的订单模型。必须理解局部物理机制和相互作用，以实现完整配置的空气动力学效应的描述。通过对流场不同部分的流动物理学的协调数值和实验研究，将实现知识的增长，并结合对完整飞机配置的相应研究。该研究小组在七个副标题中组织，对机翼上侧的自助餐，分离的尾流的发展以及与尾巴平面的相互作用进行了详细研究。这些研究将在空中客车XRF-1运输飞机配置上进行，其中将将超高的旁路Nacelle集成以研究发动机的影响和局部相互作用。为了实现与飞行相关的雷诺数的测量，实验将通过HGF和DLR的资金在低温风隧道ETW中进行。所得的数值和实验数据库将用于模拟和推导降低的订单模型以及流动物理学研究。此外，在降低的雷诺数下，将在2895上对2895进行数值和实验研究的基本流动现象，这允许与边界层相关尺度相关的空间上较高的分辨测量值。