MEGAFLOW - Numerical Flow Simulation for Aircraft Design: Results of the second phase of the German CFD initiative MEGAFLOW, presented during its ... Fluid Mechanics and Multidisciplinary Design)

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. Preface......Page 6 Contents......Page 8 Part I Grid Generation......Page 11 1 Hybrid unstructured Grid Generation in MEGAFLOW......Page 13 Part II Structured Solver FLOWer......Page 35 2 Block Structured Navier-Stokes Solver FLOWer......Page 37 3 Transition Modeling in FLOWer — Transition Prescription and Prediction......Page 55 4 Turbulence Models in FLOWer......Page 73 Part III Hybrid Solver TAU......Page 89 5 Overview of the Hybrid RANS Code TAU......Page 91 6 Algorithmic Developments in TAU......Page 103 7 Hybrid Grid Adaptation in TAU......Page 119 8 Turbulence Model Implementation in TAU......Page 127 9 G.I.G. — A Flexible User-Interface for CFD-Code Con.guration Data......Page 135 Part IV Validation......Page 143 10 Computation of Aerodynamic Coefficients for Transport Aircraft with MEGAFLOW......Page 145 11 Computation of Engine–Airframe Installation Drag......Page 161 12 Verification of MEGAFLOW-Software for High Lift Applications......Page 173 Part V Shape Optimization......Page 189 13 The Continuous Adjoint Approach in Aerodynamic Shape Optimization......Page 191 14 Application of the Adjoint Technique with the Optimization Framework Synaps Pointer Pro......Page 205 15 Shape Parametrization Using Freeform Deformation......Page 221 Part VI Contributions of Universities......Page 233 16 Advanced Turbulence Modelling in Aerodynamic Flow Solvers......Page 235 17 Large-Eddy Simulation of Attached Airfoil Flow......Page 251 18 Transition Prediction for 2D and 3D Flows using the TAU-Code and N-Factor Methods......Page 261 Part VII Exploitation of MEGAFLOW Software......Page 277 19 Application of the MEGAFLOW Software at DLR......Page 279 20 MEGAFLOW for AIRBUS-D — Applications and Requirements......Page 293 21 Aerodynamic Analysis of Flapping Airfoil Propulsion at Low Reynolds Numbers......Page 309 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 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.