New Results in Numerical and Experimental Fluid Mechanics III: Contributions to the 12th Stab/Dglr Symposium Stuttgart, Germany 2000

ISBN-13: 9783540426967 / Angielski / Twarda / 2002 / 436 str.

U. Rist; J. Heinemann; S. Wagner

Opis

This volume contains the papers of a German symposium dealing with research and project work in numerical and experimental aerodynamics and fluidmechanics for aerospace and other applications. It gives a broad overview over the ongoing work in this field in Germany.

Spis treści

High Aspect-Ratio Wings.- Design Work for the A3XX High-Lift-Wing.- Recent Improvements in the Measurement of Aerodynamic Damping Derivatives.- Calculation of Horizontal Stabilizer Efficiency with a Navier-Stokes Code.- 3D RANS Simulations for High-Lift Analysis of Transport Aircraft Configurations.- Numerical Investigation of the Reynolds-Number-Effect on the Setting Sensitivity of a 2D High-Lift Multi-Element Airfoil.- Separation Control on a High-Lift Configuration by Periodic Exitation.- Numerical Investigation of the Effect of the High-Lift Configuration of a Transport Aircraft on its Vortex Wake.- The Relationship Between Near-and-Far-Field of Vortex Wakes from Aircraft with High Aspect Ratio Wings.- Influence of Different Flap Settings on the Hazard Posed to Following Aircraft.- Numerical Simulation of Wake-Vortex Encounters Using the Chimera-Technique.- Aspects of Low Speed Wind Tunnel Testing on an A400M Model with Propeller Simulation.- Coupling of DLR Navier-Stokes Solver FLOWer with an eN-Database Method for Laminar-Turbulent Transition Prediction on Airfoils.- Low Aspect-Ratio Wings.- Unsteady Measurements with the Continuously Rotating DLR-PSP-Model at the Transonic Wind Tunnel Göttingen (DNW-TWG).- Hypersonic Flows.- Turbulence Modeling for Reentry-Vehicles.- Computation of the Two-Dimensional Flow in SERN Nozzles.- Experimental Investigation of a Hypersonic Inlet for the TSTO-Configuration ELAC.- Aerodynamic Analysis of the Dual-Mode Ramjet Vehicle JAPHAR.- Study of Shock-Wave/Boundary-Layer Interaction Flowfield on a 24° Ramp Model.- Numerical Investigations of Small-Amplitude Disturbances in a Laminar Boundary Layer with Impinging Shock Waves.- Surface Temperature Effects on Shock-Wave Boundary-Layer Interaction of Ramp Flows.- Fluid-Structure-Coupling.- Preliminary Results of Numerical Simulations of Elastic Panels in Transonic Flows.- Fundamentals of Fluid Flow.- Numerical Simulation of Laminar Separation-Bubble Control.- On the Structure of Turbulence in the Transition Cylinder Wake.- Transition and Fluidmechanical Modelling.- Investigation of Subgrid-Scale Models in LES of Turbulent Flows with Separation.- Experimental and Numerical Investigations on Transition in a Laminar Separation Bubble.- Boundary-layer Separation Computed by Second-Moment Closure Models.- Experimental Investigation on the Behaviour of Disturbances Emitted from a Point Source in a Laminar Boundary Layer.- Experimental/Numerical Investigation of the Influence of a Pressure Gradient on Acoustic Roughness Receptivity in the Boundary Layer of an Airfoil.- Interference of Wave Trains with Varying Phase Relations in a Decelerated Two-Dimensional Boundary Layer.- Secondary Instability of Steady and Unsteady Crossflow Waves.- Examination of the Eddy-Viscosity Concept Regarding its Physical Justification.- Mathematical Fundamentals/Numerical Simulation.- A Numerical Method for Compressible and Low Mach Number Fluid Flow.- Turbulent Two-Dimensional Flow Around a Flexible Membrane Airfoil.- Solution of the Euler Equations on Locally Adaptive B-Spline Grids.- An Algorithm to Treat Flows Bounded by Arbitrarily Shaped Surfaces with Cartesian Meshes.- Grid Refinement Study with a UHCA Wing-Body Configuration Using Richardson Extrapolation and Grid Convergence Index GCI.- Convergence Acceleration on Unstructured Meshes.- Enhancement of a Navier-Stokes Flow Solver for Patched Grids with Non-Coincident Grid Nodes.- Bluff Bodies.- Flow and Turbulence Structures in the Wake of a Simplified Car Model (Ahmed Modell).- Flow Visualisation, Pressure Measurements and Numerical Calculations on Spike-Tipped Bodies.- Turbomachineri.- Tip-Vortices in Transonic Axial-Compressors.- Airframe Noise.- Airframe Noise — Generation and Reduction — a Report on Status and Perspectives of DLR-Research —.- Laminar Flow Control.- Receptivity of Three-Dimensional Boundary Layers to Roughness and Suction — Linear and Nonlinear Effects.- Active Control of Tollmien-Schlichting Instabilities by Multi-Channel Sensor Actuator Systems.- Measuring Techniques.- Time Resolved 2D Measurement Techniques for Quantitative Determination of Flow Fields and Surface Pressure Distributions.- Investigation of Transitional Structures in Artificially and Disturbed Excited Flat Plate Boundary Layer Flows Using Stereo and Multi-Plane PIV.- The Meaning of Disturbance Fields in Transition Experiments and Their Detection in the Test Section Flow of a Short Duration Wind Tunnel.- Surface Fence with an Integrated, Piezoresistive Pressure Sensor for Measurements of Static and Dynamic Wall Shear Stress.- Experimental Investigation of the Flow Close to the Surface of a High Lift Airfoil Configuration in a Large Wind Tunnel.- Detection of Density Gradients at Helicopter Rotor Blades in Flight.

Blurb

This volume contains the papers of the 12. Symposium of the STAB (German Aerospace Aerodynamics Association). In this association, german scientists and engineers from universities, research-establishments and industry are involved, who are doing research and project work in numerical and experimental fluidmechanics and aerodynamics for aerospace and other applications. Many of the contributions give results from the "Luftfahrt- forschungsprogram der Bundesregierung (German Aeronautical Research Program)". Some of the papers report on work sponsored by the Deutsche Forschungsgemeinschaft, DFG, who were also present at the symposium. This volume gives a broad overview of the ongoing work in this field in Germany.