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Author : Ann Laura Clark
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (643 download)
Download or read book Effect of Curvature and Displacement on a Laminar Boundary Layer written by Ann Laura Clark and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael J Werle
Publisher :
ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.3/5 (91 download)
Download or read book Solutions of the Second-order Boundary-layer Equations for Laminar Incompressible Flow written by Michael J Werle and published by . This book was released on 1968 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use is made of self similarity approach and integral momentum technique to obtain solutions of Van Dyke's second-order boundary-layer equations for laminar incompressible flow. Accurate numerical solutions of the most general self similar equations are tabulated for the four second-order contributions due to vorticity interaction, displacement speed, longitudinal curvature, and transverse curvature. A limited number of closed form solutions are obtained which appear to have special significance at the point of first-order boundary-layer separation. In particular it is found that the displacement speed problem can proceed up to separation for only two values of the second-order pressure gradient. All other cases display an infinite discontinuity at this point. Numerical solutions of a large number of cases for the longitudinal and transverse curvature effects well support an identical conclusion. The integral momentum technique applied (a straight forward extension of the Karmen-Pohlhausen solutions) is found to be oversensitive to approximations and in the final analysis is rejected in favor of locally similar solutions. (Author).
Author : Jay M. Solomon
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.3/5 (91 download)
Download or read book An Approximate Solution for Compressible Axisymmetric Laminar Boundary Layers Including the Effects of Transverse Curvature written by Jay M. Solomon and published by . This book was released on 1967 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: An approximate momentum integral solution for the compressible axisymmetrix laminar boundary layer when transverse curvature effects are important is presented. Both finite and infinite inviscid Mach numbers are considered. Detailed comparisons with exact asymptotic solutions are given. The method is found, in many instances, to agree to leading order with the exact solutions as the transverse curvature becomes very large--a property that none of the existing approximate solutions for compressible flow possess. Some example calculations for a cone in supersonic and hypersonic flow are presented. Also, the method is applied to the hypersonic self-induced pressure problem for a cone. (Author).
Author : Stephen Fay Wornom
Publisher :
ISBN 13 :
Total Pages : 396 pages
Book Rating : 4.:/5 (399 download)
Download or read book A Numerical Study of Displacement Body and Curvature Effects on Incompressible and Compressible Laminar Boundary Layers written by Stephen Fay Wornom and published by . This book was released on 1971 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jay M. Solomon
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.3/5 (91 download)
Download or read book Axisymmetric Laminar Boundary Layers with Very Large Transverse Curvature written by Jay M. Solomon and published by . This book was released on 1967 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: The compressible axisymmetric laminar boundary layer is considered for very large values of the transverse curvature parameter (roughly proportional to the ratio of the Mangler value of the boundary layer displacement thickness to the local cross-sectional radius of the body). Asymptotic expansions are constructed using the method of inner-outer expansions and verified by comparison with exact numerical similarity solutions. Both finite and hypersonic Mach number inviscid flow conditions are considered. The principal results are asymptotic formulas for skin friction, heat transfer, and boundary layer displacement thickness. Existing expansions, obtained by Wei, are found to be incorrect. The viscous pressure interaction near the vertex of a pointed axisymmetric body is treated within the framework of boundary layer theory and a tangent-cone approximation. (Author).
Author : Albert H. Jeans
Publisher :
ISBN 13 :
Total Pages : 176 pages
Book Rating : 4.F/5 ( download)
Download or read book The Effects of Streamwise Concave Curvature on Turbulent Boundary Layer Structure written by Albert H. Jeans and published by . This book was released on 1982 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concave curvature has a relatively large, unpredictable effect on turbulent boundary layers. Some, but not all previous studies suggest that a large-scale, stationary array of counter-rotating vortices exists within the turbulent boundary layer on a concave wall. The objective of the present study was to obtain a qualitative model of the flow field in order to increase our understanding of the underlying physics. A large free-surface water channel was constructed in order to perform a visual study of the flow. Streamwise components of mean velocity and turbulence intensity were measured using a hot film anemometer. The upstream boundary was spanwise uniform with a momentum thickness to radius of curvature of 0.05. Compared to flat wall flow, large-scale, randomly distributed sweeps and ejections were seen in the boundary layer on the concave wall. The sweeps appear to suppress the normal mechanism for turbulence production near the wall by inhibiting the bursting process. The ejections appear to enhance turbulence production in the outer layers as the low speed fluid convected from regions near the wall interacts with the higher speed fluid farther out. The large-scale structures did not occur at fixed spanwise locations, and could not be called roll cells or vortices. (Author).
Author : Arloe W. Mayne (Jr.)
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.3/5 (91 download)
Download or read book A Method for Computing Boundary-layer Flows, Including Normal Pressure Gradient and Longitudinal Curvature Effects written by Arloe W. Mayne (Jr.) and published by . This book was released on 1975 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Neal Tetervin
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.3/5 (91 download)
Download or read book An Exploratory Theoretical Investigation of the Effect of Longitudinal Surface Curvature on the Turbulent Boundary Layer written by Neal Tetervin and published by . This book was released on 1969 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The equations of motion and total enthalpy are derived for a compressible turbulent boundary layer on an axisymmetric or two-dimensional surface with non-negligible longitudinal curvature. From these equations are derived the integral-momentum, kinetic-energy, and total-enthalpy equations for non-negligible longitudinal curvature. Calculations indicate that if concave curvature increases the skin friction sufficiently separation is delayed although the boundary layer is thickened. Also, an increase in curvature in the direction in which the surface pressure rises acts to hasten separation for concave curvature and delay it for convex curvature. (Author).
Author : Alec David Young
Publisher : AIAA (American Institute of Aeronautics & Astronautics)
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.X/5 (2 download)
Download or read book Boundary Layers written by Alec David Young and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 1989 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following an introduction to the basic physical concepts and the theoretical framework of boundary layers, discussion includes laminar boundary layers, the physics of the transition from laminar to turbulent flow, the turbulent boundary layer and its governing equations in time-averaging form, drag prediction by integral methods, turbulence modeling and differential methods, and current topics and problems in research and industry.
Author : Henry Görtler
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.3/5 (126 download)
Download or read book On the Three-dimensional Instability of Laminar Boundary Layers on Concave Walls written by Henry Görtler and published by . This book was released on 1954 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study is made of the stability of laminar boundary-layer profiles on slightly curved walls relative to small disturbances that result from vortices whose axes are parallel to the principal direction of flow. The result is an eigenvalue problem by which, for a given undisturbed flow at a prescribed wall, the amplification or decay is computed for each Reynolds number and each vortex thickness. For neutral disturbances (zero amplification) a critical Reynolds number is determined for each vortex distribution. The numerical calculation produces amplified disturbances on concave walls only.
Author : Ding Wang
Publisher :
ISBN 13 :
Total Pages : 714 pages
Book Rating : 4.:/5 (319 download)
Download or read book An Experimental Investigation of Curvature and Freestream Turbulence Effects on Heat Transfer and Fluid Mechanics Int Transitionalboundary Layer Flows written by Ding Wang and published by . This book was released on 1984 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M. J. Werle
Publisher :
ISBN 13 :
Total Pages : 81 pages
Book Rating : 4.:/5 (17 download)
Download or read book Longitudinal Curvature and Displacement Speed Effects on Incompressible Boundary Layers written by M. J. Werle and published by . This book was released on 1970 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: The title problem is considered for the case of flow past a circular cylinder placed normal to a uniform mainstream with Reynolds numbers from 40 to 200. Implicit finite difference numerical solutions are obtained for a set of boundary-layer equations that take account of the second order effects associated with surface curvature and displacement speed. It was found that both of these contributors have a significant influence on the internal structure of the viscous region and that an accurate estimate of the surface pressure distribution is essential for estimating the surface shear stress. (Author).
Author : Herrmann Schlichting
Publisher : Springer Science & Business Media
ISBN 13 : 9783540662709
Total Pages : 840 pages
Book Rating : 4.6/5 (627 download)
Download or read book Boundary-Layer Theory written by Herrmann Schlichting and published by Springer Science & Business Media. This book was released on 2003-05-20 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new edition of the almost legendary textbook by Schlichting completely revised by Klaus Gersten is now available. This book presents a comprehensive overview of boundary-layer theory and its application to all areas of fluid mechanics, with emphasis on the flow past bodies (e.g. aircraft aerodynamics). It contains the latest knowledge of the subject based on a thorough review of the literature over the past 15 years. Yet again, it will be an indispensable source of inexhaustible information for students of fluid mechanics and engineers alike.
Author : Jungho Kim
Publisher :
ISBN 13 :
Total Pages : 352 pages
Book Rating : 4.:/5 (319 download)
Download or read book Free-stream Turbulence and Concave Curvature Effects on Heated, Transitional Boundary Layers written by Jungho Kim and published by . This book was released on 1990 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Milton D. Van Dyke
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.F/5 ( download)
Download or read book A Survey of Higher-order Boundary-layer Theory written by Milton D. Van Dyke and published by . This book was released on 1967 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 834 pages
Book Rating : 4.X/5 (4 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1964 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : K. Toba
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (976 download)
Download or read book Some Effects of Surface Curvature on the Laminar Boundary Layer Flow written by K. Toba and published by . This book was released on 1960 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
