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Compressible Turbulent Boundary Layer Computations for Flow with Longitudinal Curvature

Compressible Turbulent Boundary Layer Computations for Flow with Longitudinal Curvature
Author: Walter B. Sturek
Publisher:
Total Pages: 32
Release: 1975
Genre: Boundary layer
ISBN:

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A numerical study has been performed using a finite-difference boundary layer computer program that includes corrections to the equations of motion for longitudinal curvature and allows the static pressure to be specified as a known function of x and y. Calculations with and without the corrections for longitudinal curvature and pressure gradient normal to be the local surface have been compared to experimental measurements of a supersonic turbulent boundary layer flow over a surface with concave longitudinal curvature. Substantially improved agreement with experimental measurements is obtained for the calculations including corrections for wall curvature and pressure gradient normal to the local surface for density profile, skin friction coefficient, and boundary-layer integral properties.


Modeling and Computation of Boundary-Layer Flows

Modeling and Computation of Boundary-Layer Flows
Author: Tuncer Cebeci
Publisher: Springer
Total Pages: 502
Release: 2005-05-04
Genre: Science
ISBN: 9783540244592

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This second edition of the book, Modeling and Computation of Boundary-Layer Flows^ extends the topic to include compressible flows. This implies the inclusion of the energy equation and non-constant fluid properties in the continuity and momentum equations. The necessary additions are included in new chapters, leaving the first nine chapters to serve as an introduction to incompressible flows and, therefore, as a platform for the extension. This part of the book can be used for a one semester course as described below. Improvements to the incompressible flows portion of the book include the removal of listings of computer programs and their description, and their incor poration in two CD-ROMs. A listing of the topics incorporated in the CD-ROM is provided before the index. In Chapter 7 there is a more extended discussion of initial conditions for three-dimensional flows, application of the characteristic box to a model problem and discussion of flow separation in three-dimensional laminar flows. There are also changes to Chapter 8, which now includes new sections on Tollmien-Schlichting and cross-flow instabilities and on the predic tion of transition with parabolised stability equations, and Chapter 9 provides a description of the rational behind interactive boundary-layer procedures.


Calculation of Turbulent Boundary Layers with Heat Transfer and Pressure Gradient Utilizing a Compressibility Transformation

Calculation of Turbulent Boundary Layers with Heat Transfer and Pressure Gradient Utilizing a Compressibility Transformation
Author: J. Boccio
Publisher:
Total Pages: 50
Release: 1972
Genre: Equations of motion
ISBN:

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An analysis of the incompressible turbulent boundary layer, developing under the combined effects of mass transfer and pressure gradient, is presented in this paper. A strip-integral method is employed whereby two of the three governing equations are obtained by integrating the combined momentum and continuity equation to 50 percent and 100 percent, respectively, of the boundary-layer height. The latter equation is the usual momentum-integral equation; the former equation requires specification of shear. Accordingly, Clauser's equilibrium eddy-viscosity law is assumed valid at this point. The third and final equation is obtained by specifying that Stevenson's velocity profiles apply throughout the domain of interest, from which a skin-friction law can be derived. Comparisons of the numerical results with the experiments of McQuaid, which include combined effects of variable pressure gradient and mass transfer, show good agreement.


Calculation of Turbulent Boundary Layers with Heat Transfer and Pressure Gradient Utilizing a Compressibility Transformation. Part 2: Constant Property Turbulent Boundary Layer Flow with Simultaneous Mass Transfer and Pressure Gradient

Calculation of Turbulent Boundary Layers with Heat Transfer and Pressure Gradient Utilizing a Compressibility Transformation. Part 2: Constant Property Turbulent Boundary Layer Flow with Simultaneous Mass Transfer and Pressure Gradient
Author:
Publisher:
Total Pages: 52
Release: 1972
Genre:
ISBN:

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Boundary Layer Flows

Boundary Layer Flows
Author: Vallampati Ramachandra Prasad
Publisher: BoD – Books on Demand
Total Pages: 264
Release: 2023-02-22
Genre: Technology & Engineering
ISBN: 1803562188

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This book provides a comprehensive overview of boundary layer flows, including laminar and turbulent flows. Chapters discuss such topics as the nature of transition, the effect of two-dimensional and isolated roughness on laminar flow, and progress in the design of low-drag airfoils. They also present theoretical and experimental results in boundary layer flows and discuss directions for future research.


A Method for Computing Boundary-Layer Flows, Including Normal Pressure Gradient and Longitudinal Curvature Effects

A Method for Computing Boundary-Layer Flows, Including Normal Pressure Gradient and Longitudinal Curvature Effects
Author:
Publisher:
Total Pages: 0
Release: 1975
Genre: Aerodynamics
ISBN:

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A method is presented for computing laminar and turbulent boundary-layer flows, including normal pressure gradient and longitudinal curvature as well as compressibility, transverse curvature, and other effects. The governing equations are transformed using the (omega squared) transformation to a von Mises form and solved using an implicit finite-difference scheme. The method is validated by comparing results with experimental data and results of other methods of computation.