Physics of Separated Flows -- Numerical, Experimental, and Theoretical Aspects: Dfg Priority Research Programme 1984-1990

ISBN-13: 9783531076409 / Angielski / Miękka / 1993 / 295 str.

Klaus Gersten

Opis

This volume contains 37 contributions in which the research work is summarized which has been carried out between 1984 and 1990 in the Priority Research Program "Physik abgeloster Stromungen" of the Deutsche Forschungsgemeinschaft (DFG, German Research Society). The aim of the Priority Research Program was the inten sive research of the whole range of phenomena associated with separated flows. Physi cal models as well as prediction methods had to be developed based on detailed experi mental investigations. It was in accordance with the main concept of the research program that scientists working on problems of separated flows in different technical areas of application participated in this program. The following fields have been represented in the program: aerodynamics of wings and bodies, aerodynamics of auto mobiles, turbomachinery, ship hydrodynamics, hydraulics, internal flows, heat exchan gers, bio-fluid-dynamics, aerodynamics of buildings and structures. In order to concentrate on problems common in all those areas the emphasis of the program was on basic research dealing with generic geometric configurations showing the fundamental physical phenomena of separated flows. The engagement and enthusiasm of all participating scientists are highly appreciated. The program was organized such that all researchers met once a year to report on the progress of their work. Special thanks ought to go to Prof. E. A. Muller (Gottingen), Prof. H. Oertel jun. (Braunschweig), Dr. W. Schmidt (Dornier), Dr. H. -W. Stock (Dornier) and Dr. B. Wagner (Dornier), who had the functions of referees on those annual meetings."

Spis treści

Overview.- Two-Dimensional Flows with Fixed Separation Point.- Turbulent backward-facing step flow.- Turbulent flow over surface-mounted obstacles in plane and axisymmetric geometries.- Calculation of separated flows with a two-layer turbulence model.- An evaluation of the discrete vortex method as a model for the flow past a flat plate normal to the flow with a large wake splitter plate.- Skin friction measurements in two- and three-dimensional highly turbulent flows with separation.- Near-wall structure in separated flows.- Flow separation over the inclined step.- Dynamics of micrometer-sized particles in a separated step flow.- The structure of the drag reduced turbulent flow over a backward-facing step — An experimental study.- Two-Dimensional Flows with Pressure Induced Separation.- Direct numerical simulation of unsteady separated boundary-layer flows over smooth backward-facing steps.- Global stability analysis of two-dimensional flow with closed separation bubbles.- Experimental investigation of laminar separation bubbles.- Computation of separated flow using the boundary-layer equations.- Method for calculating the flow around airfoils including local separation bubbles and massive separation.- Turbulence modeling for compressible separated flow.- On turbulent separated flows in axisymmetric diffusers.- Asymptotic analysis of two-dimensional turbulent separating flows.- Turbulent separating flow over humps in an open channel.- Unsteady Flows with Separation.- The flow structure in the wake and separated region of plane and axisymmetric bodies.- A new model of turbulence for separated flow behind bluff bodies.- An investigation of the separated flow past an oscillating circular cylinder.- Vortex resonant vibrations of circular and square cylinders.- Experimental analysis of the unsteady turbulent boundary-layer flow with separation on turbine blades.- Flow separation in artificial heart valves.- Three-Dimensional Flows Past Bluff Bodies and Circular Cylinders.- Large-eddy simulation of turbulent flow over sharp-edged obstacles in a plate channel.- On the separated flow behind a swept backward-facing step.- Flow around finite lengthed cylinders at low Reynolds number: End effects and their origins.- On the flow around finite circular cylinders in turbulent shear flows.- Non-parametric identification of a multiple aerodynamic pressure admittance.- Experimental investigation of the wake past bluff bodies.- Three-dimensional separated flow around automobiles with different rear profile: application of the zonal method.- Three-Dimensional Flows with Vortex Dominated Separation.- Analyis of the changing topological structures of three-dimensional separated flows.- Flow structure and heat transfer in channels with wing-type vortex generators.- Experimental investigation of the three-dimensional separated flow in an annular compressor cascade.- Laser measurements of rotational flows for the validation of Euler-codes.- LDA-investigations of the separated flow over slender wings.- Aerodynamic investigations on close-coupled canard configurations.

O autorze

Prof. Dr. Klaus Gersten ist Ordinarius für Strömungsmechanik an der Ruhr-Universität in Bochum.