Numerical Simulation of Maneuvering Aircraft by Aerodynamic, Flight Mechanics and Structural Mechanics Coupling
Selected results of the DLR Project SikMa-"Simulation of Complex Maneuvers" are presented. The objective of the SikMa Project is to develop and validate a numerical tool to simulate the unsteady aerodynamics of a free flying aeroelastic combat aircraft, by use of coupled aerodynamic, flight mechanics and aeroelastic computations. To achieve this objective, the unstructured, time-accurate flow-solver TAU is coupled with a computational module solving the flight mechanics equations of motion and a structural mechanics code determining the structural deformations. The numerical results are validated by experimental data. For this purpose several specific wind tunnel experiments with different wind tunnel models are carried out.
Low Speed Wind Tunnel Experiments on a Delta Wing Oscillating in Pitch
Thema sind statische und dynamische Kraft- und Druckmessungen an einem Deltaflugel mit einer Vorderkantenpfeilung von 65&°. im Niedergeschwindigkeitsbereich. Es werden Ergebnisse von erzwungenen Nickschwingungen um verschiedene mittlere Anstellwinkel vorgestellt.
Aeroelastic Computation Using the AMANDA Simulation Environment
Within the DLR/HGF research project AMANDA a multidisciplinary simulation environment has been developed. The well established monodisciplinary DLR code FLOWer (Computational Fluid Dynamics, CFD), TAU (CFD) and SIMPACK (Multi Body Simulation, MBS) as well as commercial codes like NASTRAN (Computational Structure Mechanics, CSM) are integrated into the environment. The data exchange needed between the monodisciplinary codes is realized by the MpCCI communication library developed by GMD. The AMANDA environment now enables aerothermal and aeroelastic applications. The paper will concentrated on the latter one. The components developed by DLR and the MpCCI library will be described with emphasis on the CFD-codes and their adaptions needed for aeroelastic applications. First steady and unsteady aeroelastic applications for the airbus like AMP wing as well as for an A340 like aircraft under cruise conditions will be presented, to demonstrate the feasibility of the AMANDA simulation environment.