CFD-Based Aeroelastic Maneuver and Gust Loads Analysis for a High Aspect Ratio Wing Configuration

Kurzfassung

Reducing the environmental impact of global air transportation is the major goal for new aircraft designs. Therefore, new aircraft wings are pushed to higher aspect ratios, to reduce the induced drag. This is a challenging task for interdisciplinary aircraft design, because the single disciplines, like structural design, aerodynamics and flight-mechanics interact with each other, which imposes additional constraints on the design. Structural constraints, like maximum strain, need to be satisfied for a vast range of load types such as maneuver and gust loads. All of them must be considered while improving the performance in a wide range inside the flight envelope. Aeroelastic loads analysis is therefore required for highly flexible wings with a high aspect ratio. In this paper a detailed loads analysis is performed utilizing high fidelity computational fluid dynamics for aerodynamic loads. Therefore, transonic effects, shock motion and flow separation are accounted for. The focus of the analysis is set to flow separation and effects of the high flexible wing and there impact on the applied loads.The focus of the analysis is set to flow separation and effects of the high flexible wing and there impact on the applied loads.The investigated load cases are pull-up, push-down, accelerated roll, and positive and negative discrete gusts for the open-loop system.