Wall Pressure Fluctuations And Pressure Velocity Correlations In A Turbulent Boundary Layer

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Wall-pressure Fluctuations and Pressure-velocity Correlations in a Turbulent Boundary Layer

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Author : John S. Serafini
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (317 download)

Book Synopsis Wall-pressure Fluctuations and Pressure-velocity Correlations in a Turbulent Boundary Layer by : John S. Serafini

Download or read book Wall-pressure Fluctuations and Pressure-velocity Correlations in a Turbulent Boundary Layer written by John S. Serafini and published by . This book was released on 1963 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: This experimental study was carried out at a free-stream Mach number of 0.6 and a Reynolds number per foot of 3.45 x 106. The magnitudes of the wall-pressure fluctuations agree with the Lilley-Hodgson theoretical results. Space-time correlations of the wall-pressure fluctuations generally agree with Willmarth's results for longitudinal separation distances. The convection velocity of the fluctuations is found to increase with increasing separation distances, and its significance is explained. Measurements with the longitudinal component of the velocity fluctuations indicate that the contributions to the wall-pressure fluctuations are from two regions, an inner region near the wall and an outer region linked with the intermittency.

Wall-pressure Fluctuations and Pressure-velocity Correlations in a Turbulent Boundary Layer

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Author : John S. Serafini
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (31 download)

Book Synopsis Wall-pressure Fluctuations and Pressure-velocity Correlations in a Turbulent Boundary Layer by : John S. Serafini

Download or read book Wall-pressure Fluctuations and Pressure-velocity Correlations in a Turbulent Boundary Layer written by John S. Serafini and published by . This book was released on 1963 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: This experimental study was carried out at a free-stream Mach number of 0.6 and a Reynolds number per foot of 3.45 x 106. The magnitudes of the wall-pressure fluctuations agree with the Lilley-Hodgson theoretical results. Space-time correlations of the wall-pressure fluctuations generally agree with Willmarth's results for longitudinal separation distances. The convection velocity of the fluctuations is found to increase with increasing separation distances, and its significance is explained. Measurements with the longitudinal component of the velocity fluctuations indicate that the contributions to the wall-pressure fluctuations are from two regions, an inner region near the wall and an outer region linked with the intermittency.

Flight Measurement of Wall-pressure Fluctuations and Boundary-layer Turbulence

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Author : Harold R. Mull
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.:/5 (317 download)

Book Synopsis Flight Measurement of Wall-pressure Fluctuations and Boundary-layer Turbulence by : Harold R. Mull

Download or read book Flight Measurement of Wall-pressure Fluctuations and Boundary-layer Turbulence written by Harold R. Mull and published by . This book was released on 1960 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Surface Pressure Fluctuations Near an Axisymmetric Stagnation Point

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Author : Richard D. Marshall
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.3/5 (91 download)

Book Synopsis Surface Pressure Fluctuations Near an Axisymmetric Stagnation Point by : Richard D. Marshall

Download or read book Surface Pressure Fluctuations Near an Axisymmetric Stagnation Point written by Richard D. Marshall and published by . This book was released on 1971 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface pressure fluctuations on a circular disk placed normal to a turbulent air stream were investigated. Turbulence intensities of approximately 10% were produced by a coarse grid installed at the test-section entrance. The turbulent field in the neighborhood of the disk was homogeneous and nearly isotropic. Experimental results indicate that existing linear theories which do not consider distortion of the flow fail to predict the nature of surface pressure fluctuations on a bluff body. Only for wavelengths which are large compared to the body do these theories yield satisfactory results. A strong attenuation of the high frequency components occurs as the flow stagnates. This is accompanied by a transfer of energy from short to long wavelengths. The opposite effect is observed as the flow attains a radial direction and approaches the edge of the disk. A neutral wavelength which undergoes little change in energy was observed. Integral scales of surface pressure fluctuations are much larger than the lateral integral scale of the free-stream turbulence. (Author).

Pressure Fluctuations in Turbulent Boundary Layers

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Author : M. V. Lowson
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (31 download)

Book Synopsis Pressure Fluctuations in Turbulent Boundary Layers by : M. V. Lowson

Download or read book Pressure Fluctuations in Turbulent Boundary Layers written by M. V. Lowson and published by . This book was released on 1965 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Rapport

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Author :
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.E/5 ( download)

Book Synopsis Rapport by :

Download or read book Rapport written by and published by . This book was released on 1955 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

NASA Technical Report

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Author :
Publisher :
ISBN 13 :
Total Pages : 722 pages
Book Rating : 4.:/5 (319 download)

Book Synopsis NASA Technical Report by :

Download or read book NASA Technical Report written by and published by . This book was released on 1963 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Power- and Cross-spectra and Space-time Correlations of Surface Fluctuating Pressures at Mach Numbers Between 1.6 and 2.5

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Author : Wei J. Chyu
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (31 download)

Book Synopsis Power- and Cross-spectra and Space-time Correlations of Surface Fluctuating Pressures at Mach Numbers Between 1.6 and 2.5 by : Wei J. Chyu

Download or read book Power- and Cross-spectra and Space-time Correlations of Surface Fluctuating Pressures at Mach Numbers Between 1.6 and 2.5 written by Wei J. Chyu and published by . This book was released on 1969 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mechanics of Flow-Induced Sound and Vibration V2

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Author : William K. Blake
Publisher : Elsevier
ISBN 13 : 0323145752
Total Pages : 569 pages
Book Rating : 4.3/5 (231 download)

Book Synopsis Mechanics of Flow-Induced Sound and Vibration V2 by : William K. Blake

Download or read book Mechanics of Flow-Induced Sound and Vibration V2 written by William K. Blake and published by Elsevier. This book was released on 2012-12-02 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanics of Flow-Induced Sound and Vibration V2

Mechanics of Flow-Induced Sound and Vibration, Volume 2

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Author : William K. Blake
Publisher : Academic Press
ISBN 13 : 0128122900
Total Pages : 694 pages
Book Rating : 4.1/5 (281 download)

Book Synopsis Mechanics of Flow-Induced Sound and Vibration, Volume 2 by : William K. Blake

Download or read book Mechanics of Flow-Induced Sound and Vibration, Volume 2 written by William K. Blake and published by Academic Press. This book was released on 2017-08-14 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanics of Flow-Induced Sound and Vibration, Volume 2: Complex Flow-Structure Interactions, Second Edition, enables readers to fully understand flow-induced vibration and sound, unifying the disciplines of fluid dynamics, structural dynamics, vibration, acoustics, and statistics in order to classify and examine each of the leading sources of vibration and sound induced by various types of fluid motion. Starting from classical theories of aeroacoustics and hydroacoustics, a formalism of integral solutions valid for sources near boundaries is developed and then broadened to address different source types, including hydrodynamically induced cavitation and bubble noise, turbulent wall-pressure fluctuations, pipe and duct systems, lifting surface flow noise and vibration, and noise from rotating machinery. Each chapter is illustrated with comparisons of leading formulas and measured data. Combined with its companion book, Mechanics of Flow-Induced Sound and Vibration, Volume 1: General Concepts and Elementary Sources, the book covers everything an engineer needs to understand flow-induced sound and vibration. This book will be a vital source of information for postgraduate students, engineers and researchers with an interest in aerospace, ships and submarines, offshore structures, construction, and ventilation. Presents every important topic in flow-induced sound and vibration Covers all aspects of the topics addressed, from fundamental theory, to the analytical formulas used in practice Provides the building blocks of computer modeling for flow-induced sound and vibration

Progress in Wall Turbulence 2

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Author : Michel Stanislas
Publisher : Springer
ISBN 13 : 3319203886
Total Pages : 439 pages
Book Rating : 4.3/5 (192 download)

Book Synopsis Progress in Wall Turbulence 2 by : Michel Stanislas

Download or read book Progress in Wall Turbulence 2 written by Michel Stanislas and published by Springer. This book was released on 2015-08-17 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the proceedings of the ERCOFTAC Workshop on Progress in Wall Turbulence: Understanding and Modelling, that was held in Lille, France from June 18 to 20, 2014. The workshop brought together world specialists of near wall turbulence and stimulated exchanges between them around up-to-date theories, experiments, simulations and numerical models. This book contains a coherent collection of recent results on near wall turbulence including theory, new experiments, DNS and modeling with RANS, LES. The fact that both physical understanding and modeling by different approaches are addressed by the best specialists in a single workshop is original.

Wall Pressure Signatures of Organized Turbulent Motions

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Author : Steven J. Russell
Publisher :
ISBN 13 : 9781423563556
Total Pages : 199 pages
Book Rating : 4.5/5 (635 download)

Book Synopsis Wall Pressure Signatures of Organized Turbulent Motions by : Steven J. Russell

Download or read book Wall Pressure Signatures of Organized Turbulent Motions written by Steven J. Russell and published by . This book was released on 1997-07-01 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive database of simultaneously obtained wall pressure and velocity measurements was acquired for a high Reynolds number, equilibrium turbulent flow. These data were obtained in both streamwise and spanwise measurement planes using an array of wall pressure transducers. Analyses of these data were performed to examine the spatial extent and convective features of turbulence producing structures. Several signal processing techniques were shown to extract detailed structural features of the turbulent motions. These techniques included digital band pass filtering to discriminate between turbulent scales and a localized variance method for the detection of clusters of high frequency turbulent activity. Cross-spectral, cross-correlation, and conditional sampling methods applied to these data clearly show the dynamical relationships between coherent turbulent motions as well as their induced wall pressure signatures. Both pressure velocity correlation results and conditionally averaged maps of the flow field sampled on peak wall pressure events, reveal a consistent correlation between large scale motions and near- wall, small scale turbulent production activity. The large scale vortical motions (or shear layers) extend across the turbulent boundary layer and exhibit Reynolds stress (turbulent production) characteristics. These findings are consistent with many of the proposed conceptual models of organized motions.

An Experimental Investigation of the Flow Structure of the Turbulent Boundary Layer

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Author : Peter W. Runstadler
Publisher :
ISBN 13 :
Total Pages : 326 pages
Book Rating : 4.3/5 (91 download)

Book Synopsis An Experimental Investigation of the Flow Structure of the Turbulent Boundary Layer by : Peter W. Runstadler

Download or read book An Experimental Investigation of the Flow Structure of the Turbulent Boundary Layer written by Peter W. Runstadler and published by . This book was released on 1963 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: A combination of visual and quantitative measurements is presented, providing a physical picture of the turbulent boundary layer flow structure on a flat plate. The flow structure is shown to consist of three zones, each zone has a one to one correspondence to the well known regions of the u+, y+ mean velocity profile. A wall layer region is shown to exist below y+ = 10. An apparently fully turbulent region exists corresponding to the logarithmic ''law of the wall'' and the ''buffer'' region. An intermittent zone appears to agree closely with the ''wake'' deviation region. An entirely new result of the investigation is the delineation of the structure of the wall layer region. This region is shown to contain a relatively regular structure of low and high velocity fluid streaks alternating in the span direction, together with the ejection of low momentum fluid into the outer flow. Correlations are given for the rate of ejection and the streak spacing. A qualitative description of other features of the wall layer region and the character of the remainder of the boundary layer flow structure is presented. (Author).

Scientific and Technical Aerospace Reports

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Author :
Publisher :
ISBN 13 :
Total Pages : 556 pages
Book Rating : 4.F/5 ( download)

Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:

NASA Technical Note

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Author :
Publisher :
ISBN 13 :
Total Pages : 772 pages
Book Rating : 4.3/5 (91 download)

Book Synopsis NASA Technical Note by :

Download or read book NASA Technical Note written by and published by . This book was released on 1972 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Fluctuating Properties of Turbulent Boundary Layers for Mach Numbers Up to 9

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Author : William D. Harvey
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (31 download)

Book Synopsis Fluctuating Properties of Turbulent Boundary Layers for Mach Numbers Up to 9 by : William D. Harvey

Download or read book Fluctuating Properties of Turbulent Boundary Layers for Mach Numbers Up to 9 written by William D. Harvey and published by . This book was released on 1969 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluctuating properties of turbulent boundary layers for Mach numbers up to 9.

The Structure of Turbulent Shear Flow

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Author : A. A. R. Townsend
Publisher : Cambridge University Press
ISBN 13 : 9780521298193
Total Pages : 450 pages
Book Rating : 4.2/5 (981 download)

Book Synopsis The Structure of Turbulent Shear Flow by : A. A. R. Townsend

Download or read book The Structure of Turbulent Shear Flow written by A. A. R. Townsend and published by Cambridge University Press. This book was released on 1976 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Develops a physical theory from the mass of experimental results, with revisions to reflect advances of recent years.