Three-Dimensional Laminar Boundary Layer Over Body of Revolution at Incidence. Part VI. General Methods and Results of the Case of High Incidence PDF Download
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Author: K. C. Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 54
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Book Description
The report presents general methods for calculating three-dimensional laminar boundary layers over inclined blunt bodies (not necessarily bodies of revolution). Complete incompressible results for a prolate spheroid at 30 degrees incidence are presented, and the computational procedures are described. The rule of the zone of dependence was observed. The results display for the first time the boundary layer structure over a non-spherical and non-conical blunt body in all details, and confirm the open-type of separation proposed earlier. (Author).
Author: K. C. Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 54
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Book Description
The report presents general methods for calculating three-dimensional laminar boundary layers over inclined blunt bodies (not necessarily bodies of revolution). Complete incompressible results for a prolate spheroid at 30 degrees incidence are presented, and the computational procedures are described. The rule of the zone of dependence was observed. The results display for the first time the boundary layer structure over a non-spherical and non-conical blunt body in all details, and confirm the open-type of separation proposed earlier. (Author).
Author: K. C. Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 45
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Book Description
The report presents results of exact, full three-dimensional solutions of the incompressible laminar boundary layer over a prolate spheroid at an extremely high incidence. In contrast to the high incidence (30 degrees) case recently reported, this extremely high incidence (45 degrees) problem is characterized by features reflecting the predominance of the circumferential flow over the meridional flow and, more importantly, by a closed, rather than an open, separation pattern. These features include much larger circumferential skin friction than meridional skin friction and that the limiting streamlines are more closely oriented along the parallels. (Author).
Author: Dale Anderson
Publisher: Taylor & Francis
ISBN: 1466578300
Category : Science
Languages : en
Pages : 763
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Book Description
Thoroughly updated to include the latest developments in the field, this classic text on finite-difference and finite-volume computational methods maintains the fundamental concepts covered in the first edition. As an introductory text for advanced undergraduates and first-year graduate students, Computational Fluid Mechanics and Heat Transfer, Thi
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 724
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Book Description
Author: K. C. Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 57
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Book Description
This work concerns an investigation of three-dimensional laminar boundary layer over a blunt body (prolate spheroid) at low incidence and with reversed flow. Results reflecting the general characteristics of such a problem are presented. More significant are the features relating to the circumferential-flow reversal.
Author: K. C.. Wang
Publisher:
ISBN:
Category : Body of revolution
Languages : en
Pages : 0
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Book Description
Author: Kuo C. Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 86
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Book Description
The previously investigated three-dimensional boundary layer near the plane of symmetry of an inclined spheroid is extended along three directions: wider range of solutions, explanations to questions left unanswered before, and comparisons with experiments. Extended solutions provide more complete trends for incidences from zero to 90 degrees and for thickness ratios ranging from unity for a sphere to nearly zero for a long inclined sylinder. Among these trends is how the separation changes from one type to another and then back again with increasing incidence. Explanations are given for a number of unconventional features; included here is why the lateral derivative of the cross velocity profile reverses. Agreement with Wilson's recent experiments (designed specifically for partial check of the results obtained earlier) enhances the significance of the investigation undertaken.
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 662
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Book Description
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.
Author: Kua C. Chang
Publisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 220
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Book Description
An implicit finite difference technique, in curvilin ear-orthogonal surface coordinates, has been developed for the solution of the differential equations of three-dimensional laminar and turbulent boundary layers on ship forms. For turbulent flow, a two-layer eddy-viscosity model has been employed as the closure model. The initial and boundary conditions required to solve the equations and the stability and accuracy of the numerical method are discussed at some length. Two mathematically-defined simple three-dimensional ship forms are studied in some detail. These are a tri-axial ellipsoid and a double elliptic ship.
Author: K. C. Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 202
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Book Description
The report documents the program 'BLIND3' and its associated difference methods. BLIND3 stands for Boundary Layer in 3 Dimensions. This program is for calculating genuine three-dimensional, incompressible, laminar boundary layer over a blunt-body at incidence. The whole calculation consists of the following five parts: inviscid calculations from known inviscid solution, stagnation-point boundary layer, symmetry-plane boundary layer, nose region boundary layer, and main body boundary layer. This program has been written in FORTRAN 5 language, and used for a UNIVAC 1108 computer in batch mode and under Exec. 8 system. It has been employed to obtain complete boundary layer solutions for a prolate spheroid at low and high incidences.
