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Release : 1980
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Book Synopsis Experimental Study of Unsteady Turbulent Boundary Layers by :
Download or read book Experimental Study of Unsteady Turbulent Boundary Layers written by . This book was released on 1980. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Angel Nicolas Menendez
Release : 1983
Genre : Turbulent boundary layer
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Book Synopsis Study of Unsteady Turbulent Boundary Layers by : Angel Nicolas Menendez
Download or read book Study of Unsteady Turbulent Boundary Layers written by Angel Nicolas Menendez. This book was released on 1983. Available in PDF, EPUB and Kindle. Book excerpt: A turbulent boundary layer, subjected to a free-stream velocity which changes sinusiodally in time under a zero time mean pressure gradient, is studied both experimentally and analytically. Using a two-component Laser Doppler Anemometer and a Heat Flux Gage, detailed and high quality information is obtained on the instantaneous velocity distribution and wall shear stress, respectively, at various stations. An asymptotic theory, for large Reynolds numbers, is developed for the oscillatory motion. It is valid for both boundary layers at arbitrary time-mean pressure gradients and fully developed pipe and channel flow, and is successfully applied to the present and previous available experimental information. The theory identifies two frequency parameters, in terms of which four different frequency regimes are defined. Similarity laws are identified for each one of these frequency regimes. All the experimental data have been archived on magnetic tape. (Author).
Author : Giles John Brereton
Release : 1987
Genre : Fluid mechanics
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Book Synopsis Experimental Study of the Fluid Mechanics of Unsteady Turbulent Boundary Layers by : Giles John Brereton
Download or read book Experimental Study of the Fluid Mechanics of Unsteady Turbulent Boundary Layers written by Giles John Brereton. This book was released on 1987. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study of the effects of forced, free-stream unsteadiness on turbulent boundary layers was undertaken in an effort to characterize the nature of such flows and to provide guidance for turbulence modelers. A turbulent boundary layer, which had developed under steady, constant-pressure conditions, was locally subjected to a range of frequencies of sinusoidal free-stream unsteadiness. The response of the boundary layer to these free-stream effects was studied through simultaneous measurements of the u and v components of the velocity field, using a two-color laser-doppler anemometer. To focus on the distinct behaviors of the deterministic and time-averaged fields of flow, the equations of fluid motion were reformulated according to a triple decomposition of velocity and pressure into; (i) a time-averaged measure, (ii) a deterministic or organized, unsteady measure, and (iii) a turbulent measure.
Author : Lawrence W. Carr
Release : 1981
Genre : Turbulence
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Book Synopsis A Compilation of Unsteady Turbulent Boundary Layer Experimental Data by : Lawrence W. Carr
Download or read book A Compilation of Unsteady Turbulent Boundary Layer Experimental Data written by Lawrence W. Carr. This book was released on 1981. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive literature search was conducted and those experiments related to unsteady turbulent boundary-layer behavior were cataloged. In addition, an international survey of industrial, university, and government research laboratories was made, in which new and ongoing experimental programs associated with unsteady turbulent boundary-layer research were identified. Pertinent references were reviewed and classified based on the technical emphasis of the various experiments that include instantaneous or ensemble-averaged profiles of boundary-layer variables are stressed. Detailed reviews that include descriptions of the experimental apparatus, flow conditions, summaries of acquired data, and significant conclusions are made. The measurements made in these experiments that exist in digital form have been stored on magnetic tape, and instructions are presented for accessing these data sets for further analysis. (Author).
Author : International Union of Theoretical and Applied Mechanics
Release : 1958
Genre : Aerodynamics
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Book Synopsis Boundary Layer Research by : International Union of Theoretical and Applied Mechanics
Download or read book Boundary Layer Research written by International Union of Theoretical and Applied Mechanics. This book was released on 1958. Available in PDF, EPUB and Kindle. Book excerpt:
