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In the scope of the DLR project oLAF (optimal load-adaptive aircraft), a highly efficient long-haul airliner is being designed, which will be used as a reference for quantifying the potential of active load alleviation. The design of this reference aircraft is based on the technologies of the highly flexible wing, the consideration of basic functions for manoeuvre load reduction and the use of a geared turbofan with a very high bypass ratio. In this work the results of the aero-structural wing optimization will be presented as an essential part of the design work. In this optimization process, high-fidelity simulation methods are used to determine the flight performance in the transonic cruise flight, the loads of the wing in manoeuvre flight and the mass of the wing box made of fibre composite materials. Static aeroelastic effects are considered in all flight conditions and a load reduction due to control surface deflections during manoeuvre flight is taken into account. The minimization of the fuel consumption for three typical flight missions represents the objective function. The geometric integration of the landing gear and the control surfaces, the tailplane sizing and aircraft trimming are considered. The selected design parameters describe the wing planform and the relative profile thickness and twist distribution. The results include a detailed presentation of the optimized wing geometry, the aerodynamic performances in the cruise and manoeuvre flight and the structural mechanical properties after structural sizing.
Deutscher Luft- und Raumfahrtkongress 2022, Dresden
Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2023
21,0 x 29,7 cm, 17 Seiten
Stichworte zum Inhalt:
Aero-Structural Design Optimization, Manoeuvre Load Alleviation, Composite Wing
Wunderlich, T.F. (2023): Multidisciplinary Optimization of Flexible Wings with Manoeuvre Load Reduction for Highly Efficient Long-Haul Airliners. Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V.. (Text). https://doi.org/10.25967/570055. urn:nbn:de:101:1-2023012713392296886026.