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Author : International Union of Theoretical and Applied Mechanics
Publisher :
ISBN 13 :
Total Pages : 432 pages
Book Rating : 4.:/5 (89 download)
Download or read book Boundary Layer Research written by International Union of Theoretical and Applied Mechanics and published by . This book was released on 1958 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David John Gee
Publisher :
ISBN 13 :
Total Pages : 250 pages
Book Rating : 4.:/5 (31 download)
Download or read book Unsteady Boundary Layers and Separation written by David John Gee and published by . This book was released on 1992 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : K. C. Wang
Publisher :
ISBN 13 :
Total Pages : 70 pages
Book Rating : 4.:/5 (354 download)
Download or read book Unsteady Boundary Layer Separation written by K. C. Wang and published by . This book was released on 1979 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new separation criterion for two-dimensional unsteady boundary layers is proposed here. This criterion is derived by analogy, from its counterpart for steady, three-dimensional boundary layer. Analogous limiting streamlines for the unsteady, two-dimensional case are first defined, and an envelope of these streamlines is used to signify unsteady separation. To demonstrate this procedure, two previously studied problems are recalculated here. These are the unsteady responses to (1) a sudden change in velocity in Howarth's problem, and (2) an impulsively-started circular cylinder. Our conclusion regarding separation for the cylinder problem disagrees with that of the Telionis and Tsahalis based on the singularity criterion, but appears to be consistent with the prediction of Proudman and Johnson. Finally, we propose a three-dimensional, unsteady separation criterion on the basis of repeated applications of either the steady, three-dimensional separation criterion at successive times or the unsteady, two-dimensional separation criteion at fixed coordinate planes. (Author).
Author : D. Tsahalis
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)
Download or read book Unsteady Boundary Layers And Separation written by D. Tsahalis and published by . This book was released on 1975 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Leonard Louis Van Dommelen
Publisher :
ISBN 13 :
Total Pages : 516 pages
Book Rating : 4.E/5 ( download)
Download or read book Unsteady Boundary Layer Separation written by Leonard Louis Van Dommelen and published by . This book was released on 1981 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Demosthenes Theodoros Tsahalis
Publisher :
ISBN 13 :
Total Pages : 304 pages
Book Rating : 4.:/5 (92 download)
Download or read book Unsteady Boundary Layers and Separation written by Demosthenes Theodoros Tsahalis and published by . This book was released on 1974 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Leon L. Van Dommelen
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.F/5 ( download)
Download or read book On the Lagrangian Description of Unsteady Boundary Layer Separation written by Leon L. Van Dommelen and published by . This book was released on 1989 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781729219256
Total Pages : 52 pages
Book Rating : 4.2/5 (192 download)
Download or read book On the Lagrangian Description of Unsteady Boundary Layer Separation. Part 1: General Theory written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-25 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although unsteady, high-Reynolds number, laminar boundary layers have conventionally been studied in terms of Eulerian coordinates, a Lagrangian approach may have significant analytical and computational advantages. In Lagrangian coordinates the classical boundary layer equations decouple into a momentum equation for the motion parallel to the boundary, and a hyperbolic continuity equation (essentially a conserved Jacobian) for the motion normal to the boundary. The momentum equations, plus the energy equation if the flow is compressible, can be solved independently of the continuity equation. Unsteady separation occurs when the continuity equation becomes singular as a result of touching characteristics, the condition for which can be expressed in terms of the solution of the momentum equations. The solutions to the momentum and energy equations remain regular. Asymptotic structures for a number of unsteady 3-D separating flows follow and depend on the symmetry properties of the flow. In the absence of any symmetry, the singularity structure just prior to separation is found to be quasi 2-D with a displacement thickness in the form of a crescent shaped ridge. Physically the singularities can be understood in terms of the behavior of a fluid element inside the boundary layer which contracts in a direction parallel to the boundary and expands normal to it, thus forcing the fluid above it to be ejected from the boundary layer. Vandommelen, Leon L. and Cowley, Stephen J. Glenn Research Center NASA-SAA-C-99066-G; RTOP 505-62-21...
Author : Laura Lynn Pauley
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.F/5 ( download)
Download or read book A Numerical Study of Unsteady Laminar Boundary Layer Separation written by Laura Lynn Pauley and published by . This book was released on 1988 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unsteady, incompressible Navier-Stokes equations were solved using a fractional timestep method. Using this technique, the separation of a laminar boundary layer under the influence of an external adverse pressure gradient was.
Author : T. Cebeci
Publisher :
ISBN 13 :
Total Pages : 39 pages
Book Rating : 4.:/5 (227 download)
Download or read book Some Important Problems in Unsteady Boundary Layers Including Separation. II. Unsteady Boundary Layers Close to the Stagnation Region of Slender Bodies written by T. Cebeci and published by . This book was released on 1984 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolution of unsteady boundary layers on the plane of symmetry of a slender prolate spheroid in uniform motion at constant angle of attack after an impulsive start has been studied for the case of prescribed pressure distribution. Calculated results have been obtained for angles of attack ranging from 30 degrees to 50 degrees and show, for example, that the unsteady-state solutions approach the steady-state solutions rapidly on the windward and leeward sides for alpha and alpha sub c (approximately - 41 degrees). This is also so on the windward side for alpha alpha sub c. On the leeward side for alpha> and alpha sub c, however, the unsteady boundary layer is initially unseparated but develops a region of reversed flow with increasing time. Subsequently, the streamwise displacement thickness develops a pronounced peak which leads to a singularity of the type observed by van Dommelen and Shen on a circular cylinder started impulsively from rest. (Author).
Author : Demetri P. Telionis
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (227 download)
Download or read book Numerical Investigation of Unsteady Boundary-layer Separation written by Demetri P. Telionis and published by . This book was released on 1972 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has been previously indicated both theoretically and experimentally that for steady flow over moving boundaries, the vanishing of skin friction does not mean separation and that separation occurs at a station where the generalized Moore-Rott-Sears (MRS) criterion is satisfied. The authors have earlier indicated numerically that the Goldstein-type separation-singularity appears at the point where the MRS criterion is satisfied. In the present paper and in accordance with the theoretical work of Sears and one of the authors, this idea is extended to unsteady flows. A Goldstein-type of a traveling singularity is discovered and interpreted as 'unsteady boundary-layer separation.' The features of the flow in the neighborhood of this singularity are investigated. (Author).
Author : Holger Babinsky
Publisher : Cambridge University Press
ISBN 13 : 1139498649
Total Pages : 481 pages
Book Rating : 4.1/5 (394 download)
Download or read book Shock Wave-Boundary-Layer Interactions written by Holger Babinsky and published by Cambridge University Press. This book was released on 2011-09-12 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shock wave-boundary-layer interaction (SBLI) is a fundamental phenomenon in gas dynamics that is observed in many practical situations, ranging from transonic aircraft wings to hypersonic vehicles and engines. SBLIs have the potential to pose serious problems in a flowfield; hence they often prove to be a critical - or even design limiting - issue for many aerospace applications. This is the first book devoted solely to a comprehensive, state-of-the-art explanation of this phenomenon. It includes a description of the basic fluid mechanics of SBLIs plus contributions from leading international experts who share their insight into their physics and the impact they have in practical flow situations. This book is for practitioners and graduate students in aerodynamics who wish to familiarize themselves with all aspects of SBLI flows. It is a valuable resource for specialists because it compiles experimental, computational and theoretical knowledge in one place.
Author : Hermann Schlichting (Deceased)
Publisher : Springer
ISBN 13 : 366252919X
Total Pages : 814 pages
Book Rating : 4.6/5 (625 download)
Download or read book Boundary-Layer Theory written by Hermann Schlichting (Deceased) and published by Springer. This book was released on 2016-10-04 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 : T. Cebeci
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (227 download)
Download or read book Some Important Problem in Unsteady Boundary Layers Including Separation. I. Nature of Singularity on Oscillating Airfoils written by T. Cebeci and published by . This book was released on 1984 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary results are presented for the analysis of unsteady laminar boundary layers on oscillating airfoils. An examination of the evolution of the boundary layer near the nose of an oscillating airfoil has revealed that, when the reduced frequency is of the same order as in experiments on dynamic stall, the unsteady boundary layer ceases to behave in a smooth manner just downstream of separation and before one cycle is completed. As for the case of the implusively started circular cylinder, the irregular behavior signals the onset of a singularity in the solution of the boundary layer equations. Numerical results for the method are compared with the numerical results of van Dommelen and Shen for the impulsively started circular cylinder, the irregular behavior signals the onset of a singularity in the solution of the boundary layer equations. Numerical results for the method are compared with the numerical results of van Dommelen and Shen for the impulsively started circular cylinder.
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Author : Demetri P. Telionis
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (64 download)
Download or read book Numerical Investigation of Unsteady Boundary-layer Separation [by] D.P. Telionis, D. Th. Tsahalis and M.J. Werle written by Demetri P. Telionis and published by . This book was released on 1972 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Konstantin E. Zalutsky
Publisher :
ISBN 13 :
Total Pages : 472 pages
Book Rating : 4.:/5 (472 download)
Download or read book Unsteady Boundary Layer Separation written by Konstantin E. Zalutsky and published by . This book was released on 2000 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unsteady inviscid motion is constructed for an airfoil undergoing a maneuver on the basis of thin airfoil theory, wherein the airfoil is thin and the flow perturbations at any stage are small (with respect to the uniform flow).
Author : Kazutoshi Tominaga
Publisher :
ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.E/5 ( download)
Download or read book A Study of Boundary Layer Control for Unsteady Separation Using Lagrangian Method written by Kazutoshi Tominaga and published by . This book was released on 1992 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
