Ultra-Performing Wing and Virtual Product Integration

Kurzfassung

Short- and medium-range aircraft are responsible for a major part of the overall green-house gas emissions in aviation. To reduce this impact, the introduction of ultra-efficient, high aspect ratio (HAR) wing aircraft with improved aerodynamic performance and thus reduced fuel consumption can contribute to a more sustainable aviation. Since the integration of the moveables gets more complex on HAR and slender wings, detailed analysis of the wing and moveables structural and aerodynamic behaviour as well as of systems integration aspects are necessary. The end-to-end simulation process developed within the DLR Virtual Product House (VPH) allows such multidisciplinary wing and moveables design tasks and the evaluation of optimum configurations. In the European Clean Aviation project Ultra Performance Wing (UP Wing), the VPH simulation process utilizing low- and high-fidelity methods such as RANS based CFD-CSM coupling (DLR-Tau and MSC Nastran) is used to perform an analysis of the DLR-F25 configuration with different wingspans. The span scaling of the wing planform is provided by a coupled overall aircraft design (OAD) process based on semiempirical methods. The detailed results from the VPH process are fed back into the OAD to evaluate the target function of a combined block fuel parameter for operationally relevant study missions. On the resulting trade curve of fuel efficiency over wing span, the optimal span and wing moveables configuration is identified. The main focus here, however, is a discussion of the trade-curve results for selected span variations with specific focus on the aerodynamic effects.