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Author : Kyle McHugh Bade
Publisher :
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.3/5 (129 download)
Download or read book Characterization of a Shear Layer Through Particle Image Velocimetry written by Kyle McHugh Bade and published by . This book was released on 2007 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ronald J. Adrian
Publisher : Cambridge University Press
ISBN 13 : 0521440084
Total Pages : 585 pages
Book Rating : 4.5/5 (214 download)
Download or read book Particle Image Velocimetry written by Ronald J. Adrian and published by Cambridge University Press. This book was released on 2011 with total page 585 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle image velocimetry, or PIV, refers to a class of methods used in experimental fluid mechanics to determine instantaneous fields of the vector velocity by measuring the displacements of numerous fine particles that accurately follow the motion of the fluid. Although the concept of measuring particle displacements is simple in essence, the factors that need to be addressed to design and implement PIV systems that achieve reliable, accurate, and fast measurements and to interpret the results are surprisingly numerous. The aim of this book is to analyze and explain them comprehensively.
Author : Douglas E. Ojala
Publisher :
ISBN 13 :
Total Pages : 127 pages
Book Rating : 4.:/5 (785 download)
Download or read book Characterization of Shock Wave Turbulent Boundary Layer Interaction Using Particle Image Velocimetry written by Douglas E. Ojala and published by . This book was released on 2012 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method for the use of Particle Image Velocimetry in the Rutgers Supersonic Wind Tunnel is established and described. The use of ice crystals as PIV seed material is tested using an oblique shock as a step response to estimate the particle lag time and particle diameter. These values were found to be 2.8 æs and 0.43 æm respectively. The Stokes number was found to be St = 0.11. The statistical properties of the undisturbed boundary layer are determined using PIV data and simplifying assumptions. The boundary layer thickness is? = 15.6mm and the free stream velocity is U1 = 621m/s. This velocity corresponds to an approximate Mach number of 3.22. Using the Clauser method, the shear velocity is u = 22.45m/s. The log-law region has a last reliable point at height y+? 500 and extends to y+? 3000. Velocity fluctuation values and trends are in agreement with published results. Investigation of streamwise XY planes of the boundary layer suggest the existence of coherent structures, particularly hairpin vortices. Galilean decomposition clearly shows vortex structures at height y/??0.2 at a convection velocity of Uc/U? = 0.75. Investigating a spanwise XZ plane at height y/?=0.1 shows coherent regions of high and low velocity which stretch beyond the fleld of view. Shock Wave Turbulent Boundary Layer Interaction is investigated in the case of a 6 and 9 degree angle of attack flat plate used to generate an oblique shock which impinges upon the turbulent boundary layer. In the 9 degree case, an average separated region of the boundary layer exists to be 2.11? long in the streamwise direction and exhibits the characteristics of a strong interaction. Ahead of the separated region, a separation shock shows streamwise motion of about ±0.25?. The 6 degree case shows no boundary layer separation in the mean flow. A reflected shock exhibits reasonably steady behavior which is characteristic of a weak interaction. The sonic line shows that the subsonic layer dilates to a height of y/?=0.27 and y/?=0.7 for the 6 and 9 degree case respectively. In both interactions, the recovery of the boundary layer extends beyond the fleld of view in the streamwise direction.
Author : Markus Raffel
Publisher : Springer Science & Business Media
ISBN 13 : 3540723072
Total Pages : 460 pages
Book Rating : 4.5/5 (47 download)
Download or read book Particle Image Velocimetry written by Markus Raffel and published by Springer Science & Business Media. This book was released on 2007-08-09 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This immensely practical guide to PIV provides a condensed, yet exhaustive guide to most of the information needed for experiments employing the technique. This second edition has updated chapters on the principles and extra information on microscopic, high-speed and three component measurements as well as a description of advanced evaluation techniques. What’s more, the huge increase in the range of possible applications has been taken into account as the chapter describing these applications of the PIV technique has been expanded.
Author : Michel Stanislas
Publisher : Springer Science & Business Media
ISBN 13 : 9401725438
Total Pages : 544 pages
Book Rating : 4.4/5 (17 download)
Download or read book Particle Image Velocimetry written by Michel Stanislas and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aeronautics industry is presently aiming for faster design cycles and shorter time to market of new aircraft. It is looking at the same time for improved aerodynamic performance, for evident competitive reasons. Advanced, computer based design systems, including fast and reliable numerical flow solvers, have been developed in the last decade including new turbulence models. On the experimental side, measurement techniques in general have also been improved significantly, however the data evaluation process remains still very time consuming, and unsteady effects and turbulence are often not being captured with sufficient accuracy and detail. The development of Particle Image Velocimetry (PIV) has helped to improve the analysis of the flow fields. After investigations in laboratory scale wind tunnels, a joint initiative on PIV research, by the European Aerospace Research Establishments, within GARTEUR have enabled a wide breakthrough of this new technology in Europe. Within the Research Framework Program of the European Union, the joint research project EUROPIV aimed to apply PIV technology to problems of industrial interest.
Author : Markus Raffel
Publisher : Springer
ISBN 13 : 3319688529
Total Pages : 680 pages
Book Rating : 4.3/5 (196 download)
Download or read book Particle Image Velocimetry written by Markus Raffel and published by Springer. This book was released on 2018-04-03 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: This immensely practical guide to PIV provides a condensed, yet exhaustive guide to most of the information needed for experiments employing the technique. This second edition has updated chapters on the principles and extra information on microscopic, high-speed and three component measurements as well as a description of advanced evaluation techniques. What’s more, the huge increase in the range of possible applications has been taken into account as the chapter describing these applications of the PIV technique has been expanded.
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781729171745
Total Pages : 28 pages
Book Rating : 4.1/5 (717 download)
Download or read book Analysis of Particle Image Velocimetry (Piv) Data for Application to Subsonic Jet Noise Studies written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-10-24 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global velocimetry measurements were taken using Particle Image Velocimetry (PIV) in the subsonic flow exiting a 1 inch circular nozzle in an attempt to better understand the turbulence characteristics of its shear layer region. This report presents the results of the PIV analysis and data reduction portions of the test and details the processing that was done. Custom data analysis and data validation algorithms were developed and applied to a data ensemble consisting of over 750 PIV 70 mm photographs taken in the 0.85 mach flow facility. Results are presented detailing spatial characteristics of the flow including ensemble mean and standard deviation, turbulence intensities and Reynold's stress levels, and 2-point spatial correlations. Blackshire, James L. Langley Research Center NAS1-19505; RTOP 538-03-12-04
Author : Clark Paterson
Publisher :
ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.:/5 (232 download)
Download or read book Particle Image Velocimetry Analysis of Rain Induced Mixing of the Oceanic Boundary Layer written by Clark Paterson and published by . This book was released on 2003 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ting Yan
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (858 download)
Download or read book Investigations of Acoustically-coupled Shear Layers Using Particle Image Velocimetry written by Ting Yan and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital particle image velocimetry is employed to investigate acoustically-coupled flow past a coaxial deep cavity (side branch) resonator mounted in a duct. The emphasis is on the effect of the separation between the coaxial side branches on the interaction between separated shear layers that form across the side branch openings. Various resonator geometries are characterized in terms of patterns of instantaneous and time-averaged flow velocity, vorticity. and streamline topology at several phases of the acoustic cycle. In addition. phase-averaged images of the flow in conjunction with unsteady pressure measurements are evaluated in order to provide insight into the mechanisms of acoustic power generation. Generally, the acoustic source undergoes a significant transformation as the distance between the coaxial side branches changes. When the side branches are located relatively far away from each other. each of them forms an independent acoustic source. As the distance between the side branches decreases. interaction between the associated oscillating shear layers results in formation of a single acoustic source of complex spatial structure.
Download or read book Investigations of Acoustically-coupled Shear Layers Using Particle Image Velocimetry written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital particle image velocimetry is employed to investigate acoustically-coupled flow past a coaxial deep cavity (side branch) resonator mounted in a duct. The emphasis is on the effect of the separation between the coaxial side branches on the interaction between separated shear layers that form across the side branch openings. Various resonator geometries are characterized in terms of patterns of instantaneous and time-averaged flow velocity, vorticity. and streamline topology at several phases of the acoustic cycle. In addition. phase-averaged images of the flow in conjunction with unsteady pressure measurements are evaluated in order to provide insight into the mechanisms of acoustic power generation. Generally, the acoustic source undergoes a significant transformation as the distance between the coaxial side branches changes. When the side branches are located relatively far away from each other. each of them forms an independent acoustic source. As the distance between the side branches decreases. interaction between the associated oscillating shear layers results in formation of a single acoustic source of complex spatial structure.
Author : Ting Yan
Publisher :
ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.:/5 (858 download)
Download or read book Investigations of Acoustically-coupled Shear Layers Using Particle Image Velocimetry written by Ting Yan and published by . This book was released on 2006 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital particle image velocimetry is employed to investigate acoustically-coupled flow past a coaxial deep cavity (side branch) resonator mounted in a duct. The emphasis is on the effect of the separation between the coaxial side branches on the interaction between separated shear layers that form across the side branch openings. Various resonator geometries are characterized in terms of patterns of instantaneous and time-averaged flow velocity, vorticity. and streamline topology at several phases of the acoustic cycle. In addition. phase-averaged images of the flow in conjunction with unsteady pressure measurements are evaluated in order to provide insight into the mechanisms of acoustic power generation. Generally, the acoustic source undergoes a significant transformation as the distance between the coaxial side branches changes. When the side branches are located relatively far away from each other. each of them forms an independent acoustic source. As the distance between the side branches decreases. interaction between the associated oscillating shear layers results in formation of a single acoustic source of complex spatial structure.
Author : Norman Chigier
Publisher : CRC Press
ISBN 13 : 9781560320289
Total Pages : 556 pages
Book Rating : 4.3/5 (22 download)
Download or read book Combustion Measurements written by Norman Chigier and published by CRC Press. This book was released on 1991-04-01 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book begins with an introduction to the general problems of making measurements in high temperature and a presentation of chemically reacting flow systems. It describes each instrument with the various diagnostic techniques and discusses measurements that have been made in furnaces, flames, and rocket engines. The detailed measurement techniques described in this book cover a wide spectrum of applications in combustion systems, including gas turbine, rocket measurement techniques that were developed in laboratories. Information obtained on detailed temperature, velocity, particle size, and gas concentration distribution is leading to improve understanding of the chemical combustion process and to design imporvements in combustors.
Author : Tom Oakley
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Cinematic Particle Image Velocimetry of a Turbulent Free Shear Layer written by Tom Oakley and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rensheng Deng
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (129 download)
Download or read book Application of Particle Image Velocimetry for Pattern Characterization in a Vertically Vibrated Granular Layer written by Rensheng Deng and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Th. Dracos
Publisher : Springer Science & Business Media
ISBN 13 : 9401587272
Total Pages : 322 pages
Book Rating : 4.4/5 (15 download)
Download or read book Three-Dimensional Velocity and Vorticity Measuring and Image Analysis Techniques written by Th. Dracos and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: The contents of this volume reflect to a large extent the efforts made by a group of Institutes at the ETH Zürich to develop new techniques for measurements of flows in fluids in the last decade. The motivation came from the study of tr~sport and mixing processes in natural and industrial systems. One of the characteristic properties of turbulence is its high mixing efficiency. The techniques developed are therefore suitable, although not exclusively, for turbulence measurements. They can be subdivided into point-measurements and field-measurements. The aim of the point-measurements developed is to determine the three components of the velocity and all their first derivatives with good temporal resolution and accuracy in turbulent flows. The old and weIl established method of hot-wire anemometry was used for this purpose. One of the main achievements in this context is the construction of miniature multi-wire probes. This technique was introduced to the Institute of Hydromechanics and Water Resources Management of ETH Zürich by Profs. A. Tsinober and E. Kit from Tel-Aviv University. This was made possible by the generous financial support by ETH, for which I would like to express my gratitude on this occasion. In addition, Dr. F.E. Joergensen from DANTEC contributed an example of recent developments in the hardware ofConstant Temperature Anemometry (CTA), for which I am very thankful.
Author : Andreas Schröder
Publisher : Springer Science & Business Media
ISBN 13 : 3540735283
Total Pages : 516 pages
Book Rating : 4.5/5 (47 download)
Download or read book Particle Image Velocimetry written by Andreas Schröder and published by Springer Science & Business Media. This book was released on 2008-01-14 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the main results reached using the EC-funded network PivNet 2. It also presents a survey of the state of the art of scientific research using PIV techniques. You get a clear introduction to the basics of these techniques. The authors then guide you through current and possible future applications for flow analysis, including combustion and supersonic flow. Hundreds of illustrations, many in full color, are provided.
Author : Center for Turbulence Research (U.S.)
Publisher :
ISBN 13 :
Total Pages : 410 pages
Book Rating : 4.:/5 (56 download)
Download or read book Annual Research Briefs ... written by Center for Turbulence Research (U.S.) and published by . This book was released on 2010 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
