Application of the MEGAFLOW Software at DLR
The present contribution outlines several selected applications of the MEGAFLOW software at DLR, roughly according to the time-frame of the MEGAFLOW II project from 1998 – 2002. The majority of the applications is based on 3-dimensional viscous computations featuring the solution of the compressible Reynolds-averaged Navier-Stokes equation in combination with one or two transport equation turbulence models. The examples highlight a quite broad range of applications. This refers to onflow speed as well as to the mode of application, covering analysis as well as design and optimization tasks. In general a clear trend in the use of the MEGAFLOW system becomes visible. On the one hand the analyses of very specific flow and/or aircraft details on overall configurations of increasing complexity is carried out. On the other hand more design and optimization applications are requested. For both types of applications the MEGAFLOW software has become an indispensable tool for the aerodynamic and also multi-disciplinary tasks of DLR.
KeywordsHigh Lift RANS Simulation Wind Tunnel Model Transport Aircraft Equation Turbulence Model
Unable to display preview. Download preview PDF.
- 1.Kroll, N., Rossow, C.-C., Schwamborn, D., Becker, K., Heller, G., “MEGAFLOW — A Numerical Flow Simulation Tool for Transport Aircraft Design”, 23rd ICAS Congress, Toronto, paper 2002-1.10.5, 2002Google Scholar
- 2.Ronzheimer, A., Brodersen, O., “Hybrid Grid Generation for Aircraft Configurations at DLR”, Proceeding of the 7th international conference on numerical grid simulation in computational field simulation, pp.1071–1080, ed. B. K. Soni et.al., 25.09–28.09.2000Google Scholar
- 3.Heller, G., Dirmeier, S., Kreuzer, P., Streit, Th., “Aerodynamische Leistungsverbesserung durch Flügelspitzenmodifikation am Beispiel der Envoy 7”, DGLR Jahrestagung Hamburg, 17.-20.09., DGLR Jahrbuch 2001, 2001Google Scholar
- 4.Degani, D., Schiff, L.B., and Levy, Y., “Physical Considerations Governing Computation of Turbulent Flows Over Bodies at Large Incidence,” AIAA Paper 90-0096, 1990Google Scholar
- 5.Frhr. v. Geyr, H., private communications, 2002Google Scholar
- 6.Edwards, J. R., Chandra, S., “Comparison of Eddy Viscosity-Transport Turbulence Models for Three-Dimensional, Shock Separated Flowfields”, AIAA Journal, No. 4, April 1996Google Scholar
- 8.Melber, S., “3D RANS Simulations for High Lift Transport Aircraft Configurations with Engines”, DLR IB 124-2002/27, 2002Google Scholar
- 9.Herrmann, U., “Designing High Lift Systems for Low Drag: SCT”, Proceedings of the lecture series of the von Karman Institute of Fluid Dynamics: CFD based Aircraft Drag Prediction and reduction, Brussels, 03.02–07.02.2003Google Scholar
- 10.Herrmann, U., “Validation of European CFD Codes for SCT low-speed high-lift Computations”, AIAA Paper 2001/2406, 2001Google Scholar
- 11.Rowan, T., “Functionality Stability Analysis of Numerical Algorithms”, PhD-Thesis, University of Texas, Austin, Texas, USA, 1990Google Scholar
- 12.Wild, J., “Direct Optimisation of Multi-Element-Airfoils for High-Lift using Navier-Stokes Equations.” in Computational Fluid Dynamics 1998, pp. 383/390, Verlag John Wiley & Sons, Chichester, UK, 1998. Proceedings of the 4th European Computational Fluid Dynamics Conference (ECCOMAS), 1998Google Scholar