Boundary Layer Pressure Fluctuations And Structural Response

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Boundary Layer Pressure Fluctuations and Structural Response

Author : Deane R. Blackman
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (413 download)

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Book Synopsis Boundary Layer Pressure Fluctuations and Structural Response by : Deane R. Blackman

Download or read book Boundary Layer Pressure Fluctuations and Structural Response written by Deane R. Blackman and published by . This book was released on 1967 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigations of the pressure fluctuations under a turbulent boundary layer, and the resultant vibration of simple panels, were extended to consider the vibration of stringer-panel arrays and the intermittent pressure field in the boundary layer transition region. The response of multi-panel arrays to turbulent boundary layer excitation was measured for a flow speed of 320 ft./sec. Displacement spectra for the first band of modes, measured at the bay centres, were compared with results due to acoustic excitation at grazing incidence. The vibration in the lower order modes is greater for the acoustic excitation but the converse is true for the higher order modes. Displacement cross correlation measurements show the presence of standing waves for distances up to three bay lengths but the wave system breaks down over larger distances. A comparison of random techniques used in structural damping measurements shows the autocorrelation decay method to be the most reliable. Using specially constructed gating apparatus, pressure measurements in the laminar-turbulent transition region show that the turbulent spots are autonomous regions of turbulent boundary layer, with similar pressure spectra. In addition there are low frequency pressure fluctuations due to the disturbances produced by the pressure steps on the mean flow. The background noise levels in the wind tunnel were measured.

Boundary Layer Pressure Fluctuations and Structural Response

Author : Deane R. Blackman
Publisher :
ISBN 13 :
Total Pages : 117 pages
Book Rating : 4.:/5 (413 download)

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Book Synopsis Boundary Layer Pressure Fluctuations and Structural Response by : Deane R. Blackman

Download or read book Boundary Layer Pressure Fluctuations and Structural Response written by Deane R. Blackman and published by . This book was released on 1967 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigations of the pressure fluctuations under a turbulent boundary layer, and the resultant vibration of simple panels, were extended to consider the vibration of stringer-panel arrays and the intermittent pressure field in the boundary layer transition region. The response of multi-panel arrays to turbulent boundary layer excitation was measured for a flow speed of 320 ft./sec. Displacement spectra for the first band of modes, measured at the bay centres, were compared with results due to acoustic excitation at grazing incidence. The vibration in the lower order modes is greater for the acoustic excitation but the converse is true for the higher order modes. Displacement cross correlation measurements show the presence of standing waves for distances up to three bay lengths but the wave system breaks down over larger distances. A comparison of random techniques used in structural damping measurements shows the autocorrelation decay method to be the most reliable. Using specially constructed gating apparatus, pressure measurements in the laminar-turbulent transition region show that the turbulent spots are autonomous regions of turbulent boundary layer, with similar pressure spectra. In addition there are low frequency pressure fluctuations due to the disturbances produced by the pressure steps on the mean flow. The background noise levels in the wind tunnel were measured.

A Review of Flight and Wind Tunnel Measurements of Boundary Layer Pressure Fluctuations and Induced Structural Response

Author : David Alan Bies
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis A Review of Flight and Wind Tunnel Measurements of Boundary Layer Pressure Fluctuations and Induced Structural Response by : David Alan Bies

Download or read book A Review of Flight and Wind Tunnel Measurements of Boundary Layer Pressure Fluctuations and Induced Structural Response written by David Alan Bies and published by . This book was released on 1966 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Wall Pressure Fluctuations in Boundary Layer Flow and Response of Simple Structures to Random Pressure Fields

Author : M. K. Bull
Publisher :
ISBN 13 :
Total Pages : 300 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Wall Pressure Fluctuations in Boundary Layer Flow and Response of Simple Structures to Random Pressure Fields by : M. K. Bull

Download or read book Wall Pressure Fluctuations in Boundary Layer Flow and Response of Simple Structures to Random Pressure Fields written by M. K. Bull and published by . This book was released on 1963 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented for r.m.s. pressure, spectra and broad and narrow band space-time correlations of the wall pressure field of a turbulent boundary layer and of correlations between wall pressure and longitudinal velocity fluctuations. Preliminary results of some similar measurements in the laminar-turbulent transition region of a boundary layer are also given. The report also includes results of measurements of panel response to turbulent boundary layer, jet and siren excitation.

Wall Pressure Fluctuations in Boundary Layer Flow and Response of Simple Structures to Random Pressure Fields. Pt. 1-3

Author : M.K. Bull
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (841 download)

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Book Synopsis Wall Pressure Fluctuations in Boundary Layer Flow and Response of Simple Structures to Random Pressure Fields. Pt. 1-3 by : M.K. Bull

Download or read book Wall Pressure Fluctuations in Boundary Layer Flow and Response of Simple Structures to Random Pressure Fields. Pt. 1-3 written by M.K. Bull and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Prediction of Boundary Layer Pressure Fluctuations

Author : Martin V. Lowson
Publisher :
ISBN 13 :
Total Pages : 41 pages
Book Rating : 4.:/5 (413 download)

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Book Synopsis Prediction of Boundary Layer Pressure Fluctuations by : Martin V. Lowson

Download or read book Prediction of Boundary Layer Pressure Fluctuations written by Martin V. Lowson and published by . This book was released on 1968 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pressure fluctuations beneath equilibrium boundary layers at subsonic and supersonic speeds are reviewed. Empirical formulae are presented for the intensity, spectra, and cross spectra of the fluctuations. The formulae are intended for direct use in structural response calculations. A simple theoretical model to predict intensities at supersonic speeds is put forward, and the effects of nonequilibrium boundary layers are discussed in general terms. An appendix gives theoretical justification for negative exponential correlation curves at large spacings. (Author).

Aeroelasticity of Plates and Shells

Author : E.H. Dowell
Publisher : Springer Science & Business Media
ISBN 13 : 9789028604049
Total Pages : 166 pages
Book Rating : 4.6/5 (4 download)

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Book Synopsis Aeroelasticity of Plates and Shells by : E.H. Dowell

Download or read book Aeroelasticity of Plates and Shells written by E.H. Dowell and published by Springer Science & Business Media. This book was released on 1974-11-30 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Some Results of Experimental Investigations of the Surface Pressure Field Due to a Turbulent Boundary Layer

Author : M. K. Bull
Publisher :
ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Some Results of Experimental Investigations of the Surface Pressure Field Due to a Turbulent Boundary Layer by : M. K. Bull

Download or read book Some Results of Experimental Investigations of the Surface Pressure Field Due to a Turbulent Boundary Layer written by M. K. Bull and published by . This book was released on 1961 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental results for the space-time correlations of the fluctuating pressure field of a turbulent boundary layer are given, and an empirical representation of the pressure field suitable for structural response calculations is presented. Variation with Mach number of r.m.s. pressure as a function of skin friction is given for Mach numbers up to about 1.6. The probability distribution of the pressure fluctuations at a fixed point in the field is found to approximate closely to Gaussian. The acoustic power output from a boundary layer on a larger boundary surface is obtained. Spectra of boundary layer noise in tow jet aircraft are presented and compared with the spectrum of the boundary layer excitation. (Author).

Pressure Fluctuations in Turbulent Boundary Layers

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

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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:

Fundamental Studies of Turbulent Wall Pressure Fluctuations with Applications to Advanced Acoustic Sensor Systems

Author :
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Fundamental Studies of Turbulent Wall Pressure Fluctuations with Applications to Advanced Acoustic Sensor Systems by :

Download or read book Fundamental Studies of Turbulent Wall Pressure Fluctuations with Applications to Advanced Acoustic Sensor Systems written by and published by . This book was released on 1989 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes the work done under the Hydroacoustic Special Research Opportunity (SRO) in computation of turbulent boundary layer wall pressure fluctuations, analyses of boundary layer flow noise and receptivity to sound, measurements of wall pressure fluctuations and computations of structural response.

NASA Scientific and Technical Reports

Author : United States. National Aeronautics and Space Administration Scientific and Technical Information Division
Publisher :
ISBN 13 :
Total Pages : 2300 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis NASA Scientific and Technical Reports by : United States. National Aeronautics and Space Administration Scientific and Technical Information Division

Download or read book NASA Scientific and Technical Reports written by United States. National Aeronautics and Space Administration Scientific and Technical Information Division and published by . This book was released on 1967 with total page 2300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Turbulent Boundary Layer Pressure Fluctuations and Their Effect on Adjacent Structures

Author : J. F. Wilby
Publisher :
ISBN 13 :
Total Pages : 31 pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Turbulent Boundary Layer Pressure Fluctuations and Their Effect on Adjacent Structures by : J. F. Wilby

Download or read book Turbulent Boundary Layer Pressure Fluctuations and Their Effect on Adjacent Structures written by J. F. Wilby and published by . This book was released on 1964 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 920 pages
Book Rating : 4.:/5 (31 download)

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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 1987 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Stochastic Structural Dynamics

Author : T. Ariaratnam
Publisher : CRC Press
ISBN 13 : 1000109933
Total Pages : 396 pages
Book Rating : 4.0/5 (1 download)

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Book Synopsis Stochastic Structural Dynamics by : T. Ariaratnam

Download or read book Stochastic Structural Dynamics written by T. Ariaratnam and published by CRC Press. This book was released on 2020-12-17 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains a series of original contributions in the area of Stochastic Dynamics, which demonstrates the impact of Mike Lin's research and teaching in the area of random vibration and structural dynamics.

Mechanics of Flow-Induced Sound and Vibration V2

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

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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

NASA Technical Note

Author :
Publisher :
ISBN 13 :
Total Pages : 538 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis NASA Technical Note by :

Download or read book NASA Technical Note written by and published by . This book was released on 1973 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mechanics of Flow-Induced Sound and Vibration, Volume 2

Author : William K. Blake
Publisher : Academic Press
ISBN 13 : 0128122900
Total Pages : 696 pages
Book Rating : 4.1/5 (281 download)

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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 696 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