New Results in Numerical and Experimental Fluid Mechanics: Contributions to the 10th AG Stab/Dglr Symposium Braunschweig, Germany 1996

ISBN-13: 9783322865755 / Angielski / Miękka / 2012 / 438 str.

Horst K. Rner; Reinhard Hilbig

Opis

This volume contains the contributions to the 10th DGLR I AG ST AB-Symposium held at the German Aerospace Research Establishment (DLR) -Braunschweig Research Centre - November, 11 to 13, 1996. AG STAB is the German Aerospace AerodynapIics Association, founded at the end of the 70', while DGLR is the German Society for Aeronautics and Astronautics (Deutsche Gesellschaft fur Luft- und Raumfahrt, LilienthaI Oberth Gesellschaft). In the AG STAB German scientists and engineers from universities, research-establishments and industries are involved, who are doing research and project work in numerical and experimental fluidmechanics and aerodynamics for aerospace and other applications. About 20 years ago it became obvious for this community that a joint effort of members of universities, the DLR and industry was necessary to counter-act declining budgets in the field. It was decided to approach high-level persons in industry, ministries and the parliament for help to shift the trend with its negative effects for research and industry. From the begin it was clear that an effort should be built around a central theme. ''Flow with Separation" became the topic of the AG STAB (Arbeitsgemeinschaft Stromung mit Ablosung), which developed fast into a lively association, with, however, a larger scope than just flow with separation."

Spis treści

Invited Papers.- Cooperation Projekt Aeronautical Research.- Reduction of Aerodynamic Drag (RaWid) — Status after the First Year of the Programme.- National CFD Projekt MEGAFLOW — Status Report —.- Laminar-Turbulent Transition Research at DLR.- The Development of Advanced Internal Balances for Cryogenic and Conventional Tunnels.- Contributed Papers.- Parallel Numerical Airplane Wing Design.- Experiments on Active Control of Tollmien-Schlichting Waves on a Wing.- Stability Analysis of Two- and Three-Dimensional Boundary Layer Flows with Varied Wall Temperatures.- Heat Loads During Hypersonic Flight-Conditions at Low Altitudes: Computations and Free-Flight Investigations of Several Testdomes.- Experimental Studies of the Turbulent Flow Structure of Leading-Edge Vortices.- Density Measurements on a Delta Wing by Means of Planar Intensity Distribution of Rayleigh Scattered Laser Light (PIRS) in the lm x lm Transonic Wind Tunnel Göttingen (TWG).- Close Coupling of Very High-Bypass Engines in Combination with Take-Off/Landing Configurations.- Numerical Investigation of Boundary Layer Instabilities Over a Blunt Flat Plate at Angle of Attack in Supersonic Flow.- Application of Two-Parameter Turbulence Models to the Prediction of Two-Dimensional Free Turbulent Sheer Flows.- Numerical and Experimental Investigations of Flow Induced by Harmonic Motion of a Circular Cylinder.- Status and Some New Results Obtained in the HEG.- Mesh Modification Techniques for Navier-Stokes Meshes.- Flight Experiment Guidance Technique for Research on Transition with Grob G109b Aircraft of the Technische Hochschule Darmstadt.- Alternative Drag Calculations from Off Body Flow Quantities Using the FLOWer Code.- Numerical Simulation of the X-31 A Flow Characteristics.- Experimental Inestigation of Active (Dynamic) Control of Hydrodynamic Instability in a Two-Dimensional Boundary Layer.- Simulation of Unsteady, Three-Dimensional, Viscous Flows Using a Dual-Time Stepping Method.- Unsteady Boundary Layer Separations on Swept and Unswept Wings in Sinusoidal Dynamic Stall Motion.- Numerical Aerodynamic Optimization Study for a Supersonic Aircraft.- Investigation on a Transonic Transport Aircraft Wing with an Optimized Trailing Edge.- Calibration of Codes for Computing Bi-Conic Flowfields.- Flow Visualization and Application of Particle-Image-Velocimetry to the Hypersonic Configuration ELAC 1.- Simulation of the Flow Past a Circular Cylinder Using Local Block Refinement.- Secondary Instabilities in a Laminar Separation Bubble.- Flexibility and Effiziency of a Transport-Equation Turbulence Model for Three-Dimensional Flow.- Visualization of High Speed Boundary Layer Transition with FPA Infrared Technique.- Application of PIV in the Large Low Speed Facility of DNW.- Refined Streamline Patterns for Unsteady Boundary Layer Separation.- Surface Inclination and Heat Transfer Methods for Reacting Hypersonic Flow in Thermochemical Equilibrium.- Techniques to Enhance Reliability and Efficiency of Flow Calculations on Unstructured Grids.- Design of a Laminar-Glove for the A340 and First Results of a High-Speed Wind-Tunnel Test.- Investigations of Hypersonic Intakes.- Boundary Layer Bleed in Hypersonic Inlets.- High Resolution Measurement of Turbulence in Axial Compressors.- The Preliminary Aircraft Design and Optimization Program for Supersonic Commercial Transport Aircraft PrADO-Sup.- Design of a Laminar Wing for a Commuter Airplane Using a 3D-Design Method.- Impact of Planform Geometry on Waverider Aerodynamics.- Visualization of the Spatial-Temporal Instability Wave Development in a Laminar Boundary Layer by Means of a Heated PVDF Sensor Array.- In-Flight Research on Boundary Layer Transition — Works of the DFG „University Research Group“.- On Subcritical Breakdown to Turbulence in Swept Wing Attachment Line Boundary Layer Flows.- Numerical Simulation of the Vortex Sheet Roll-Up Behind Wings with Different Lift Distributions.- Turbulent Flow in Idealized Czochralski Crystal Growth Configurations.- Euler Calculations for Flows Around Longitudinally Accelerated Profiles and Profiles in Shear Flow.- Numerical Investigation of the Flow Around a Fuselage-Canard-Configuration for a Long Range High Capacity Aircraft.- Transition Process of a Wave Train in a Laminar Boundary Layer.- Wind Tunnel and Water Tunnel Studies of Vertical Fin Buffeting.- Experimental Investigations of Transition Development in Attached Boundary Layers and Laminar Separation Bubbles.- On-Line Data Processing for the DLR-F9-Windtunnel Experiment.