Effects of Surface Roughness on the Flow Characteristics in a Turbulent Boundary Layer
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Page : pages
File Size : 32,56 MB
Release : 2001
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Author :
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Page : pages
File Size : 32,56 MB
Release : 2001
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Page : 176 pages
File Size : 36,37 MB
Release : 1983
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A previous study on the effect of surface roughness on the turbulent boundary layer, using a Fortran code, ITRACT, solved for the characteristics of a laminar, transitional and turbulent boundary layer on smooth surfaces. The present study investigates the influence of surface roughness on a compressible turbulent boundary layer and then extends the usefulness of ITRACT by including in it the optional capability of rough-surface boundary-layer calculations. Surface roughness was represented by distributed sources and sinks in the appropriate governing equations. The most important term is a sink term in the mean momentum equation, representing the form drag due to the roughness element. Governing boundary-layer equations for continuity, momentum, and energy were derived in a form to account for blockage effects due to roughness elements. The modified governing equations were then transformed using Probstein-Elliott and Levy-Lees transformations. The resulting equations, with appropriate boundary conditions, were solved by finite-difference techniques to determine the nondimensional velocity components and temperature at a finite number of nodes in the boundary-layer flow field.
Author : Vallampati Ramachandra Prasad
Publisher : BoD – Books on Demand
Page : 236 pages
File Size : 41,17 MB
Release : 2020-01-22
Category : Mathematics
ISBN : 1839681853
Written by experts in the field, this book, "Boundary Layer Flows - Theory, Applications, and Numerical Methods" provides readers with the opportunity to explore its theoretical and experimental studies and their importance to the nonlinear theory of boundary layer flows, the theory of heat and mass transfer, and the dynamics of fluid. With the theory's importance for a wide variety of applications, applied mathematicians, scientists, and engineers - especially those in fluid dynamics - along with engineers of aeronautics, will undoubtedly welcome this authoritative, up-to-date book.
Author : Jinjun Wang
Publisher : Cambridge University Press
Page : 293 pages
File Size : 27,44 MB
Release : 2019
Category : Science
ISBN : 1107161568
Master the theory, applications and control mechanisms of flow control techniques.
Author : Felix W. Fenter
Publisher :
Page : pages
File Size : 45,1 MB
Release : 1958
Category : Turbulent boundary layer
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Author : A. A. R. Townsend
Publisher : Cambridge University Press
Page : 450 pages
File Size : 33,84 MB
Release : 1976
Category : Mathematics
ISBN : 9780521298193
Develops a physical theory from the mass of experimental results, with revisions to reflect advances of recent years.
Author : F. W. Fenter
Publisher :
Page : 94 pages
File Size : 38,83 MB
Release : 1955
Category : Aerodynamics, Supersonic
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Author : Hermann Schlichting (Deceased)
Publisher : Springer
Page : 814 pages
File Size : 39,80 MB
Release : 2016-10-04
Category : Technology & Engineering
ISBN : 366252919X
This new edition of the near-legendary textbook by Schlichting and revised by Gersten presents a comprehensive overview of boundary-layer theory and its application to all areas of fluid mechanics, with particular emphasis on the flow past bodies (e.g. aircraft aerodynamics). The new edition features an updated reference list and over 100 additional changes throughout the book, reflecting the latest advances on the subject.
Author : D. R. Croft
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Page : pages
File Size : 18,13 MB
Release : 1961
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Author : Edmund J. O'Keefe
Publisher :
Page : 67 pages
File Size : 49,62 MB
Release : 1975
Category : Plates (Engineering)
ISBN :
An experimental study of boundary-layer velocity profiles and turbulent wall-pressure spectra on a smooth flat plate with varying localized roughness conditions is reported. The sandpaper surface roughness ranged from a smooth wall to the fully rough condition. Transition and turbulent flow data are consistent with those in the published literature. In addition, new data have been obtained for the wall-pressure spectra for a complete range of roughness conditions. Formulas for estimating the increase in wall spectra levels due to varying surface-roughness conditions are presented.