Separation Of Flow

Author : Paul K. Chang
Publisher : Elsevier
Page : 796 pages
File Size : 52,9 Mb
Release : 2014-06-28
Category : Technology & Engineering
ISBN : 9781483181288

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Separation of Flow by Paul K. Chang Pdf

Interdisciplinary and Advanced Topics in Science and Engineering, Volume 3: Separation of Flow presents the problem of the separation of fluid flow. This book provides information covering the fields of basic physical processes, analyses, and experiments concerning flow separation. Organized into 12 chapters, this volume begins with an overview of the flow separation on the body surface as discusses in various classical examples. This text then examines the analytical and experimental results of the laminar boundary layer of steady, two-dimensional flows in the subsonic speed range. Other chapters consider the study of flow separation on the two-dimensional body, flow separation on three-dimensional body shape and particularly on bodies of revolution. This book discusses as well the analytical solutions of the unsteady flow separation. The final chapter deals with the purpose of separation flow control to raise efficiency or to enhance the performance of vehicles and fluid machineries involving various engineering applications. This book is a valuable resource for engineers.

Author : Klaus Gersten
Publisher : Springer Science & Business Media
Page : 305 pages
File Size : 42,6 Mb
Release : 2013-06-29
Category : Science
ISBN : 9783663139867

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Physics of Separated Flows — Numerical, Experimental, and Theoretical Aspects by Klaus Gersten Pdf

This volume contains 37 contributions in which the research work is summarized which has been carried out between 1984 and 1990 in the Priority Research Program "Physik abgeloster Stromungen" of the Deutsche Forschungsgemeinschaft (DFG, German Research Society). The aim of the Priority Research Program was the inten sive research of the whole range of phenomena associated with separated flows. Physi cal models as well as prediction methods had to be developed based on detailed experi mental investigations. It was in accordance with the main concept of the research program that scientists working on problems of separated flows in different technical areas of application participated in this program. The following fields have been represented in the program: aerodynamics of wings and bodies, aerodynamics of auto mobiles, turbomachinery, ship hydrodynamics, hydraulics, internal flows, heat exchan gers, bio-fluid-dynamics, aerodynamics of buildings and structures. In order to concentrate on problems common in all those areas the emphasis of the program was on basic research dealing with generic geometric configurations showing the fundamental physical phenomena of separated flows. The engagement and enthusiasm of all participating scientists are highly appreciated. The program was organized such that all researchers met once a year to report on the progress of their work. Special thanks ought to go to Prof. E. A. Muller (Gottingen), Prof. H. Oertel jun. (Braunschweig), Dr. W. Schmidt (Dornier), Dr. H. -W. Stock (Dornier) and Dr. B. Wagner (Dornier), who had the functions of referees on those annual meetings.

Author : Louis G. Kaufman,Robert D. Kirchner
Publisher : Unknown
Page : 80 pages
File Size : 51,7 Mb
Release : 1978
Category : Turbulence
ISBN : UOM:39015095319078

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High Speed Flow Separation Ahead of Finite Span Steps by Louis G. Kaufman,Robert D. Kirchner Pdf

Detailed surface heat transfer data, oil flow, and schlieren photographs are presented for high speed flow separation ahead of finite span, forward facing steps on flat plates. Step spans were varied from three to ten times as large as the step height, and the step heights are three to four times larger than the undisturbed turbulent boundary layer thickness. Reynolds numbers, based on plate length, were approximately 15 million for both Mach 4.75 and Mach 5.04 local undisturbed flows over the flat plate surface. For these test conditions, the maximum extent of separation ahead of the step is approximately 4.4 times as large as the step height independent of step span, and peak heating rates were measured that are more than six to eight times larger than the undisturbed flow heating rates. Peak heating on the plate surface occurs slightly upstream and approximately 1/2 step height inboard of the outboard sides of the steps; the increase in peak heat transfer coefficients over the undisturbed flow values decreases with increasing step span. In addition to presenting the detailed surface heat transfer data, a plausible theoretical analysis is presented for calculating the region of turbulent boundary layer separation ahead of these finite span steps.

Author : Paul K. Chang
Publisher : Hemisphere Pub
Page : 556 pages
File Size : 48,8 Mb
Release : 1976
Category : Science
ISBN : STANFORD:36105030262880

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Control of Flow Separation by Paul K. Chang Pdf

Author : Robert W. Fox,Alan T. McDonald,John W. Mitchell
Publisher : John Wiley & Sons
Page : 608 pages
File Size : 41,5 Mb
Release : 2020-06-30
Category : Science
ISBN : 9781119721024

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Fox and McDonald's Introduction to Fluid Mechanics by Robert W. Fox,Alan T. McDonald,John W. Mitchell Pdf

Through ten editions, Fox and McDonald's Introduction to Fluid Mechanics has helped students understand the physical concepts, basic principles, and analysis methods of fluid mechanics. This market-leading textbook provides a balanced, systematic approach to mastering critical concepts with the proven Fox-McDonald solution methodology. In-depth yet accessible chapters present governing equations, clearly state assumptions, and relate mathematical results to corresponding physical behavior. Emphasis is placed on the use of control volumes to support a practical, theoretically-inclusive problem-solving approach to the subject. Each comprehensive chapter includes numerous, easy-to-follow examples that illustrate good solution technique and explain challenging points. A broad range of carefully selected topics describe how to apply the governing equations to various problems, and explain physical concepts to enable students to model real-world fluid flow situations. Topics include flow measurement, dimensional analysis and similitude, flow in pipes, ducts, and open channels, fluid machinery, and more. To enhance student learning, the book incorporates numerous pedagogical features including chapter summaries and learning objectives, end-of-chapter problems, useful equations, and design and open-ended problems that encourage students to apply fluid mechanics principles to the design of devices and systems.

Author : S. M. Belotserkovsky,V. N. Kotovskii,M. I. Nisht,R. M. Fedorov
Publisher : CRC Press
Page : 322 pages
File Size : 49,8 Mb
Release : 1992-11-30
Category : Technology & Engineering
ISBN : 084939306X

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Two-Dimensional Separated Flows by S. M. Belotserkovsky,V. N. Kotovskii,M. I. Nisht,R. M. Fedorov Pdf

Two-Dimensional Separated Flows provides a systematic presentation of the theory of separated flow around bodies. The main classes of aerodynamic problems of plane-parallel flow around bodies are described, and the steady aerodynamic, unsteady aerodynamic, and statistical characteristics of a trailing wake are determined. Numerical methods based on the synthesis of models for non-viscous incompressible flow and boundary layer, algorithms, examples, and systematic comparisons are presented. The book also includes numerical results for the problem of separated flow around fixed, oscillating, and rotating cylinders, in addition to results for separated flow around an aerofoil over a wide range of angles. Two-Dimensional Separated Flows will benefit researchers and students studying aerodynamics, aircraft dynamics, aeroelasticity, and the aerodynamics of building structures.

Author : G. V. Lachmann
Publisher : Unknown
Page : 600 pages
File Size : 44,7 Mb
Release : 1961
Category : Electronic
ISBN : OCLC:312819606

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Boundary Layer and Flow Control by G. V. Lachmann Pdf

Author : Marvin Shinbrot
Publisher : Courier Corporation
Page : 242 pages
File Size : 52,9 Mb
Release : 2013-05-13
Category : Science
ISBN : 9780486267968

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Lectures on Fluid Mechanics by Marvin Shinbrot Pdf

A readable and user-friendly introduction to fluid mechanics, this high-level text is geared toward advanced undergraduates and graduate students. Topics include a derivation of the equations of fluid motion from statistical mechanics, classical theory, and a portion of the modern mathematical theory of viscous, incompressible fluids, with considerable attention to the Navier-Stokes equations. 1973 edition.

Author : Frank T. Smith,Susan N. Brown
Publisher : Springer Science & Business Media
Page : 403 pages
File Size : 51,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642830006

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Boundary-Layer Separation by Frank T. Smith,Susan N. Brown Pdf

The IUTAM Symposium on Boundary-Layer Separation, suggested by the UK National Committee of Theoretical and Applied Mechanics and supported by the International Union of Theoretical and Applied Mechanics, was held at University College London on August 26-28, 1986. The proposed theme and scope of the Symposium were designed to help to bring about the necessary interaction between experimentalists, computationalists and theoreticians for the furthering of understanding in this challenging subject. The talks and discussions were aimed at representing the very wide range and application of separating-flow phenomena, which often substantially affect the whole of fluid dynamics at medium to large Reynolds numbers, covering in particular both laminar and turbulent flow, steady or unsteady, two- or three-dimensional, small or large-scale, incompressible or compressible, external or internal, from the experimental, computational and theoretical standpoints. It was intended that about 80 scientists would participate in the Symposium, with about 25 talks being delivered, to which poster sessions with 8 contributions were added subsequently. All the speakers and poster presenters were selected by the scientific committee, although two late replacements of speakers were required. Fruitful discussions, well led by the session chairmen, took place formally after each talk and after the poster sessions and informally on other occasions including the social events. The present proceedings of the Symposium appear to reflect much of the current state of experimental, computational and theoretical work and progress in boundary-layer separation. We hope that they provide also ideas, questions and stimulation, in addition to major recent developments.

Author : Frederick K. Goodwin,Jack Norman Nielsen,Larry L. Lynes
Publisher : Unknown
Page : 102 pages
File Size : 47,5 Mb
Release : 1969
Category : Axial flow
ISBN : UOM:39015095298850

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Inhibition of Flow Separation at High Speed by Frederick K. Goodwin,Jack Norman Nielsen,Larry L. Lynes Pdf

The purpose of the report is to extend previous analytical work of the authors to colder walls by including a term of higher order in the assumed total temperature profile. The analysis is developed for both flat-plate-wedge and cylinder-flare configurations. The effect of this higher order term on the theoretical critical temperature ratio, found in the earlier work for separation of the free-interaction type, is discussed. At the beginning of interaction the boundary layer is assumed to be of the Blasius type and the flow at the edge of the boundary layer throughout the interaction is assumed to be isentropic. Comparisons between the theoretical calculations and experiments are presented for both two-dimensional and axisymmetric configurations. The ratio of wall temperature to free-stream stagnation temperature varies from 1.0 to 0.2. The agreement between the theoretical and experimental pressure distributions is considered good. A comparison between theoretical and experimental heat-transfer distributions indicates only fair agreement.

Author : Jack Norman Nielsen,Larry L. Lynes,Frederick K. Goodwin
Publisher : Unknown
Page : 68 pages
File Size : 48,9 Mb
Release : 1969
Category : Correlation (Statistics)
ISBN : UOM:39015095298868

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Inhibition of Flow Separation at High Speed by Jack Norman Nielsen,Larry L. Lynes,Frederick K. Goodwin Pdf

The report describes the results of a wind-tunnel test program on an ogive-cylinder-flare combination to determine the extent of laminar separation as a function of wall temperature for fixed free-stream Reynolds number per unit length at a free-stream Mach number of 8.0. The objective of the tests was to see if separation could be eliminated entirely by cooling the wall to a sufficiently low value. Pressure and temperature distributions spanning the separation region were made on a quick-insertion model, but the location of the separation point could not be obtained during the tests. Accordingly, a combined experimental-theoretical method was developed for determining the separation point location. Correlation of the separation length with model temperature ratio indicated that the separation distance was small and was rapidly approaching zero at the lowest wall temperature ratio achieved experimentally. The apparent critical wall temperature ratio so indicated by the data was lower than the theoretical ratio. It was not possible to achieve sufficiently low temperatures to see if separation could be entirely eliminated. Possible reasons for the difference between experiment and theory are discussed.

Author : Viktor I. Terekhov,Aleksey Yu. Dyachenko,Yaroslav J. Smulsky,Tatyana V. Bogatko,Nadezhda I. Yarygina
Publisher : Springer Nature
Page : 230 pages
File Size : 55,8 Mb
Release : 2022-02-05
Category : Science
ISBN : 9783030945572

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Heat Transfer in Subsonic Separated Flows by Viktor I. Terekhov,Aleksey Yu. Dyachenko,Yaroslav J. Smulsky,Tatyana V. Bogatko,Nadezhda I. Yarygina Pdf

This book presents the results of scientific research performed over the past two decades by the authors. The book discusses some issues of separated laminar flows that are of great practical interest for the development of new technologies using microchannel flows, where separation zones can form. Of particular interest is the complex mechanism of flow separation with superimposed high external turbulence. The challenges of finding the optimal location for the cavities and fins on heat exchange surfaces are also considered. This is an important fundamental and practical problem when creating new schemes of efficient heat exchangers in various power plants. A wide class of problems of turbulent flow in tubes with flow separation is considered. These data will be useful in engineering estimates of the thermal–hydraulic efficiency of various heat transfer intensifiers. This book focuses on the analysis of thermal characteristics of separated flows, as well as the possibility of controlling the intensity of heat exchange processes, from the point of view of both their intensification and their suppression.

Author : National Research Council,Division on Engineering and Physical Sciences,Commission on Physical Sciences, Mathematics, and Applications,Naval Studies Board
Publisher : National Academies Press
Page : 1100 pages
File Size : 54,8 Mb
Release : 1997-09-11
Category : Science
ISBN : 9780309058797

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Twenty-First Symposium on Naval Hydrodynamics by National Research Council,Division on Engineering and Physical Sciences,Commission on Physical Sciences, Mathematics, and Applications,Naval Studies Board Pdf

Author : Viktor Vladimirovich Kozlov,A. V. Dovgal,International Union of Theoretical and Applied Mechanics
Publisher : Springer
Page : 934 pages
File Size : 55,5 Mb
Release : 1991
Category : Science
ISBN : STANFORD:36105002231244

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Separated Flows and Jets by Viktor Vladimirovich Kozlov,A. V. Dovgal,International Union of Theoretical and Applied Mechanics Pdf

Main sections covered numerical simulations and theoretical approaches - general aspects, incompressible turbulent boundary layer separation, shock waves/turbulent boundary interactions, control techniques, laminar separation and instability, organized structures in jets, separated flows and mixing layers.

Author : Jain-Ming Wu,Hideki Kuwano
Publisher : Unknown
Page : 68 pages
File Size : 40,9 Mb
Release : 1976
Category : Aerodynamics
ISBN : UOM:39015095343227

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Experimental Study on High Subsonic Turbulent Flow Incipient Separation by Jain-Ming Wu,Hideki Kuwano Pdf

For flow over a two-dimensional ramp compression corner case, an experimental investigation to determine the incipient separation was carried out at Mach numbers between 0.55 and 0.9 and Reynolds numbers (based on undisturbed boundary layer thickness) between 350,000 and 690,000. Detailed surface pressure, pitot traversing and oil flow data were obtained for each ramp angle case. Two-dimensionality of the ramp compression corners was verified by the surface oil flow. A major finding of this study is that the incipient separation ramp angle is relatively independent of Mach number and Reynolds number within the range studied. The incipient separation ramp angle was found to be about 22.5 degrees.