Notes on Numerical Fluid Mechanics, vol. 89: MEGAFLOW - numerical flow simulation for aircraft design: results of the second phase of the German CFD initiative MEGAFLOW, presented during its closing symposium at DLR, Braunschweig, Germany, December 10 and

This volume contains results of the German CFD initiative MEGAFLOW which combines many of the CFD development activities from DLR, universities and aircraft industry. It highlights recent improvements and enhancements of the MEGAFLOW software system. This software includes the block-structured Navier-Stokes code FLOWer and the unstructured Navier-Stokes code TAU. Improvements to numerical algorithms and physical modelling capabilities of these codes are discussed. Validation activities concerning their capability to predict viscous flows around complex industrially relevant configurations for transport aircraft design are presented. The high level of maturity both codes have reached is demonstrated based on the intensive use of FLOWer and TAU by the German aerospace industry in the design process of a new aircraft. Front Matter....Pages 1-1 Hybrid unstructured Grid Generation in MEGAFLOW....Pages 3-24 Front Matter....Pages 25-25 Block Structured Navier-Stokes Solver FLOWer....Pages 27-44 Transition Modeling in FLOWer — Transition Prescription and Prediction....Pages 45-62 Turbulence Models in FLOWer....Pages 63-77 Front Matter....Pages 79-79 Overview of the Hybrid RANS Code TAU....Pages 81-92 Algorithmic Developments in TAU....Pages 93-108 Hybrid Grid Adaptation in TAU....Pages 109-115 Turbulence Model Implementation in TAU....Pages 117-123 G.I.G. — A Flexible User-Interface for CFD-Code Configuration Data....Pages 125-131 Front Matter....Pages 133-133 Computation of Aerodynamic Coefficients for Transport Aircraft with MEGAFLOW....Pages 135-150 Computation of Engine-Airframe Installation Drag....Pages 151-161 Verification of MEGAFLOW-Software for High Lift Applications....Pages 163-178 Front Matter....Pages 179-179 The Continuous Adjoint Approach in Aerodynamic Shape Optimization....Pages 181-193 Application of the Adjoint Technique with the Optimization Framework Synaps Pointer Pro....Pages 195-209 Shape Parametrization Using Freeform Deformation....Pages 211-222 Front Matter....Pages 223-223 Advanced Turbulence Modelling in Aerodynamic Flow Solvers....Pages 225-240 Large-Eddy Simulation of Attached Airfoil Flow....Pages 241-250 Transition Prediction for 2D and 3D Flows using the TAU-Code and N-Factor Methods....Pages 251-266 Front Matter....Pages 267-267 Application of the MEGAFLOW Software at DLR....Pages 269-282 MEGAFLOW for AIRBUS-D — Applications and Requirements....Pages 283-297 Front Matter....Pages 267-267 Aerodynamic Analysis of Flapping Airfoil Propulsion at Low Reynolds Numbers....Pages 299-313

the Aerospace Industry Increasingly Relies On Advanced Numerical Simulation Tools In The Early Design Phase. This Volume Provides The Results Of A German Initiative Which Combines Many Of The Cfd Development Activities From The German Aerospace Center (dlr), Universities, And Aircraft Industry. Numerical Algorithms For Structured And Hybrid Navier-stokes Solvers Are Presented In Detail. The Capabilities Of The Software For Complex Industrial Applications Are Demonstrated.

The computational fluid dynamics (CFD) for aerospace applications deals with the simulation of aircraft aerodynamics and is becoming more and more an integral part of the aircraft design.