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Author : Alexander C. Charters
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.:/5 (437 download)
Download or read book The Effect of Curvature on Boundary Layer Transition written by Alexander C. Charters and published by . This book was released on 1938 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Milton Clauser
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (437 download)
Download or read book The Effect of Curvature on the Transition from Laminar to Turbulent Boundary Layer written by Milton Clauser and published by . This book was released on 1937 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the flow over the upper surface of a wing, a discrepancy between the predicted and actual point of transition from laminar to turbulent boundary layer has been found. This effect may be due to the comparatively small radius of curvature of the upper surface of the wing. The present tests were undertaken to investigate this effect.
Author : Robert Edward Radke
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (348 download)
Download or read book The Effect of Periodic-unsteady Wakes, Curvature, and Pressure Gradient on Boundary-layer Transition written by Robert Edward Radke and published by . This book was released on 1994 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722961091
Total Pages : 140 pages
Book Rating : 4.9/5 (61 download)
Download or read book Bypass Transition in Boundary Layers Including Curvature and Favorable Pressure Gradient Effects written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent studies of 2-D boundary layers undergoing bypass transition were reviewed. Bypass transition is characterized by the sudden appearance of turbulent spots in boundary layer without first the regular, observable growth of disturbances predicted by linear stability theory. There are no standard criteria or parameters for defining bypass transition, but it is known to be the mode of transition when the flow is disturbed by perturbations of sufficient amplitude. Volino, R. J. and Simon, T. W. Unspecified Center BOUNDARY LAYER TRANSITION; BYPASSES; CURVATURE; FLOW STABILITY; PRESSURE GRADIENTS; BOUNDARY LAYERS; COMPUTATIONAL FLUID DYNAMICS; PERTURBATION...
Author :
Publisher :
ISBN 13 :
Total Pages : 75 pages
Book Rating : 4.:/5 (946 download)
Download or read book The Effect of Curvature on the Evolution of a Boundary Layer Subjected to a Strong Adverse Pressure Gradient written by and published by . This book was released on 2001 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Negligible wall shear stress provides the criterion that minimizes the distance over which boundary layer can decelerate without separating from the surface. Over the past few years, we have been carefully investigating the boundary layer that is continuously maintained on the verge of separation, without actually being allowed to separate 1. The experimental facility that was used consists of a contraction, a constant area throat, and a two-dimensional variable geometry expansion inserted into the 2' by 3' test section of a low speed wind tunnel (figure 1). The expansion is corrected of Lexan supported by electric actuators mounted on gimbals and capable of distorting the surface under computer control. The surface geometry can vary over a wide range of pressure gradients and streamline curvature. The transition between the throat and the test surface is accomplished by means of a circular cylinder to which the lexan surface is attached, thereby establishing the initial slope of the test surface. The side-wall boundary layers were removed by using suction and the measurements were made on the boundary layer developing on the curved surface.
Author : Virendrakumar Chaturbhai Patel
Publisher :
ISBN 13 : 9780114702007
Total Pages : 31 pages
Book Rating : 4.7/5 (2 download)
Download or read book The Effects of Curvature on the Turbulent Boundary Layer written by Virendrakumar Chaturbhai Patel and published by . This book was released on 1969 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hans Schmidbauer
Publisher :
ISBN 13 :
Total Pages : 570 pages
Book Rating : 4.F/5 ( download)
Download or read book Behavior of Turbulent Boundary Layers on Curved Convex Walls written by Hans Schmidbauer and published by . This book was released on 1936 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: The system of linear differential equations which indicated the approach of separation and the so-called "boundary-layer thickness" by Gruschwitz is extended in this report to include the case where the friction layer is subject to centrifugal forces. Evaluation of the data yields a strong functional dependence of the momentum change and wall drag on the boundary-layer thickness radius of curvature ratio for the wall. It is further shown that the transition from laminar to turbulent flow occurs at somewhat higher Reynolds Numbers at the convex wall than at the flat plate, due to the stabilizing effect of the centrifugal forces.
Author : Farouk Hachem
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (142 download)
Download or read book A Boundary Layer Transition Correlation for Concave Surfaces written by Farouk Hachem and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The boundary layer profile is observed to be highly distorted by the momentum transfer associated with Taylor-Gortler vortices. This distortion has the effect or increasing the boundary layer growth rate and modifying the start-or-transition momentum thickness Reynolds numbers from the flat plate value. For modest curvatures, the vortices carry turbulence towards the blade which promotes transition, but as the curvature is increased further, the boundary layer profile shape is stabilised and transition is delayed. A model for the distorted boundary layer is presented and is used to predict the boundary layer growth rate and correlate the start or transition results in terms of the momentum thickness and blade radius Reynolds numbers and the free stream turbulence level. The degree or profile distortion needs to be accounted for when predicting the end or transition.
Author : Robert Edward Mayle
Publisher : Logos Verlag Berlin GmbH
ISBN 13 : 3832545980
Total Pages : 418 pages
Book Rating : 4.8/5 (325 download)
Download or read book Elements of Transitional Boundary-Layer Flowlements written by Robert Edward Mayle and published by Logos Verlag Berlin GmbH. This book was released on 2018 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Second Enhanced Edition Suitable for advanced-level courses or an independent study in fluid mechanics, this text by an expert in the field provides the basic aspects of laminar-to-turbulent flow transition in boundary layers. Logically organized into three major parts, the book covers pre- and post-transitional flow, transitional flow, and several advanced topics in periodically disturbed transitional flow. Some of the subjects covered within the book include high-frequency unsteady laminar flow, turbulent flow, natural transition, bypass transition, turbulent spot theory, turbulent spot kinematics and production, correlations for the onset and rate of transition, global and conditional averaging, transitional flow models, wakeinduced transition, multimode transition, and separated-flow transition. Containing some 202 figures (all drawn by the author), 28 tables, 12 appendices, a supplement on tensors, and an extensive bibliography, the 415 page book provides a wealth of data and information about the subject.
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 : Roger L. Kimmel
Publisher :
ISBN 13 :
Total Pages : 46 pages
Book Rating : 4.3/5 (91 download)
Download or read book The Effect of Pressure Gradients on Transition Zone Length in Hypersonic Boundary Layers written by Roger L. Kimmel and published by . This book was released on 1993 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Boundary layer transition was measured in zero, favorable, and adverse pressure gradients at Mach 8 using heat transfer. Models consisted of 7 degrees half angle forecones 0.4826 m long, followed by flared or ogive aft bodies 0.5334 m long. The flares and ogives produced constant pressure gradients. For the cases examined, favorable pressure gradients delay transition and adverse pressure gradients promote transition, but transition zone lengths are shorter in favorable pressure gradient. Results of the effect of adverse pressure gradient on transition zone lengths were inconclusive.
Author : United States. National Advisory Committee for Aeronautics
Publisher :
ISBN 13 :
Total Pages : 500 pages
Book Rating : 4.F/5 ( download)
Download or read book Wartime Report written by United States. National Advisory Committee for Aeronautics and published by . This book was released on with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 : D. Laurence
Publisher : Elsevier
ISBN 13 : 0080530982
Total Pages : 975 pages
Book Rating : 4.0/5 (85 download)
Download or read book Engineering Turbulence Modelling and Experiments - 4 written by D. Laurence and published by Elsevier. This book was released on 1999-04-14 with total page 975 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings contain the papers presented at the 4th International Symposium on Engineering Turbulence Modelling and Measurements held at Ajaccio, Corsica, France from 24-26 May 1999. It follows three previous conferences on the topic of engineering turbulence modelling and measurements. The purpose of this series of symposia is to provide a forum for presenting and discussing new developments in the area of turbulence modelling and measurements, with particular emphasis on engineering-related problems. Turbulence is still one of the key issues in tackling engineering flow problems. As powerful computers and accurate numerical methods are now available for solving the flow equations, and since engineering applications nearly always involve turbulence effects, the reliability of CFD analysis depends more and more on the performance of the turbulence models. Successful simulation of turbulence requires the understanding of the complex physical phenomena involved and suitable models for describing the turbulent momentum, heat and mass transfer. For the understanding of turbulence phenomena, experiments are indispensable, but they are equally important for providing data for the development and testing of turbulence models and hence for CFD software validation.
Author : Kenneth F. Stetson
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.3/5 (91 download)
Download or read book Comments on Hypersonic Boundary-layer Transition written by Kenneth F. Stetson and published by . This book was released on 1990 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a survey paper on the subject of hypersonic boundary-layer transition. Part 1 discusses boundary-layer stability theory, hypersonic boundary-layer stability experiments, and a comparison between theory and experiment. Part 2 contains comments on how many configuration and flow parameters influence transition. Part 3 discusses some additional general aspects of transition. Part 4 discusses problems of predicting transition and comments on three prediction methods. Part 5 contains some general guidelines for prediction methodology. Keywords: Boundary layer transition, Boundary layer stability, Hypersonic boundary layers.
Author : T. W. Simon
Publisher :
ISBN 13 :
Total Pages : 228 pages
Book Rating : 4.:/5 (317 download)
Download or read book Turbulent Boundary Layer Heat Transfer Experiments written by T. W. Simon and published by . This book was released on 1982 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (946 download)
Download or read book Laminar-Turbulent Transition in High-Speed Compressible Boundary Layers with Curvature: Non-Zero Angle of Attack Experiments written by and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This grant supported the work of two additional graduate students in the area of high speed boundary layer transition. The non-zero angle of attack measurements were delayed, to reduce the risk of damaging the model, currently in use at zero angle of attack (AOA). Instead, a high sensitivity laser differential interferometer is being developed, for non-intrusive high bandwidth measurements of instability waves. Work towards the larger wind tunnel discussed in the proposal was also advanced, through measurements of the effect of elevated driver tube temperatures on the extent of quiet flow. Apparatus for placement of the elliptic cone at a 3-degree AOA has been designed; these measurements will commence on completion of the zero AOA measurements, late in 1997.
