Author : P. A. Krogstad
Publisher :
Page : 60 pages
File Size : 34,28 MB
Release : 1982
Category : Turbulent boundary layer
ISBN :
This report describes the results of the three-dimensional turbulent boundary-layer calculations performed for the Eurovisc Workshop held in Berlin on 1 April 1982. It is shown that the present method, based on the Crank-Nicolson finite-difference scheme and a simple eddy-viscosity model for turbulence, yields satisfactory results provided regions of viscous-inviscid interaction, which were present in at least three of the four test cases, are avoided. (Author).
Author : Felix J. Pierce
Publisher :
Page : 144 pages
File Size : 40,29 MB
Release : 1971
Category : Boundary value problems
ISBN :
A method of solving the three-dimensional, incompressible turbulent boundary-layer equations was developed using a Crank-Nicholson implicit finite-difference technique, with the turbulent stress terms modeled with an eddy-viscosity model obtained from mixing length theory. The method was applied to two three-dimensional flow geometries for which experimental data exists and a comparison with this data showed excellent agreement. A complete computer program was sufficiently generalized for application to two-dimensional laminar and turbulent flows with arbitrary pressure gradients. The method was applied to several such test cases and the solutions agreed well with both theory and experiment. An analysis was presented to determine the conditions for which the finite difference equations were stable and convergent. (Author).
Author : J. H. Baek
Publisher :
Page : 146 pages
File Size : 29,49 MB
Release : 1984
Category : Laminar flow
ISBN :
Detailed mean-flow and turbulence measurements have been made in the boundary layer in the plane of symmetry of a body of revolution at incidence. These data and the somewhat limited information available from previous experiments are utilized, together with extensive plane-of-symmetry boundary-layer calculations in laminar and turbulent flows, to determine the most important effects of mean-flow convergence and divergence. (Author).
Author : Thomas A. Zang
Publisher :
Page : 46 pages
File Size : 10,98 MB
Release : 1985
Category : Turbulent boundary layer
ISBN :
Author : John F. Nash
Publisher :
Page : 210 pages
File Size : 13,2 MB
Release : 1972
Category : Boundary layer
ISBN :
Author : A. J. Wheeler
Publisher :
Page : 218 pages
File Size : 27,99 MB
Release : 1971
Category : Boundary layer
ISBN :
Author : O. Sendstad
Publisher :
Page : 130 pages
File Size : 48,55 MB
Release : 1992
Category : Simulation methods
ISBN :
Author : Tuncer Cebeci
Publisher : Elsevier
Page : 423 pages
File Size : 34,35 MB
Release : 2012-12-02
Category : Technology & Engineering
ISBN : 0323151051
Analysis of Turbulent Boundary Layers focuses on turbulent flows meeting the requirements for the boundary-layer or thin-shear-layer approximations. Its approach is devising relatively fundamental, and often subtle, empirical engineering correlations, which are then introduced into various forms of describing equations for final solution. After introducing the topic on turbulence, the book examines the conservation equations for compressible turbulent flows, boundary-layer equations, and general behavior of turbulent boundary layers. The latter chapters describe the CS method for calculating two-dimensional and axisymmetric laminar and turbulent boundary layers. This book will be useful to readers who have advanced knowledge in fluid mechanics, especially to engineers who study the important problems of design.
Author : V. C. Patel
Publisher :
Page : 32 pages
File Size : 41,32 MB
Release : 1982
Category : Turbulent boundary layer
ISBN :
Three-dimensional thin boundary-layer equations for laminar and turbulent flows are solved by two different numerical schemes. The methods are applied to the flow over bodies of revolution at incidence and the results are compared with the available experimental data in order to study the range of validity of the classical boundary-layer approximations in regions of increasing circumferential gradients and flow reversal associated with the early stages of a free-vortex type of separation. Comparison with the DFVLR 6:1 spheroid data of Meier et al and the 4:1 combination-body data of Ramaprian, Patel and Choi indicate that the methods perform well in regions where the boundary layer remains thin but the predictions deteriorate as the boundary layer thickens. The results point out the need for the development of methods of handle thick boundary layers and viscous-inviscid interactions. (Author).
Author :
Publisher :
Page : 652 pages
File Size : 10,33 MB
Release : 1995
Category : Aeronautics
ISBN :
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
