Laser Doppler and Phase Doppler Measurement Techniques


Author: H.-E. Albrecht,Nils Damaschke,Michael Borys,Cameron Tropea
Publisher: Springer Science & Business Media
ISBN: 3662051656
Category: Technology & Engineering
Page: 738
View: 5606

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Providing the first comprehensive treatment, this book covers all aspects of the laser Doppler and phase Doppler measurement techniques, including light scattering from small particles, fundamental optics, system design, signal and data processing, tracer particle generation, and applications in single and two-phase flows. The book is intended as both a reference book for more experienced users as well as an instructional book for students. It provides ample material as a basis for a lecture course on the subject and represents one of the most comprehensive treatments of the phase Doppler technique to date. The book will serve as a valuable reference book in any fluid mechanics laboratory where the laser Doppler or phase Doppler techniques are used. This work reflects the authors' long practical experience in the development of the techniques and equipment, as the many examples confirm.

Sensor-Technologien

Band 2: Geschwindigkeit, Durchfluss, Strömungsfeld
Author: Marcus Wolff
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 311047784X
Category: Technology & Engineering
Page: 362
View: 3871

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Das Gebiet der Sensorik ist zurzeit einem auffalligen Wandel unterworfen. Viele neue Verfahren werden zur Marktreife gefuhrt und verdrangen bis dato etablierte altere Techniken. Neue Anforderungen, unter anderem durch die notwendige Automatisierungs- und Vernetzungstechnik im Zuge von Industrie 4.0, beschleunigen diese Veranderungen zusatzlich. Hier ist es schwierig den Uberblick zu behalten. Welche Wirkprinzipien werden aktuell fur die Messung eingesetzt? Fur welche Anwendungen sind diese geeignet? Wie sieht eine typische industrielle Umsetzung aus? Welche Spezifi kationen haben exemplarische kommerzielle Produkte? Das vorliegende Buch beantwortet die Fragen in verstandlicher Form. Es behandelt Sensor-Technologien fur die Groen Geschwindigkeit, Stromungsfeld und Durchfl uss. Die Sensoren werden dafur nach dem Wirkprinzip geordnet prasentiert. Neben den physikalischen Grundlagen und dem Funktionsprinzip werden auch noch Anwendungen und kommerzielle Produkte vorgestellt. Durch diese Strukturierung eignet sich das Buch gleichermaen als Lehrbuch fur Studierende (Bachelor und Master) und Ratgeber fur Praktiker. Das Spektrum reicht dabei von Lichtschrankensystemen fur die Weg-Zeit-Messung basierte Geschwindigkeitsmessung in der Verkehrstechnik bis zur Particle-Image-Velocimetrie fur die Aufnahme komplexer, dreidimensionaler Stromungsfelder. Prof. Dr.-Ing. Marcus Wolff ist Professor an der Hochschule fur Angewandte Wissenschaften Hamburg und leitet dort das Heinrich-Blasius-Institut fur Physikalische Technologien. Er lehrte Sensorik und Experimentalphysik.

Untersuchung thermoakustischer Instabilitäten von Sprayflammen


Author: Enrico Bärow
Publisher: Logos Verlag Berlin GmbH
ISBN: 3832547312
Category: Technology & Engineering
Page: 132
View: 9642

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Gasturbinen und Flugtriebwerke müssen immer schärfere Emissionsgrenzwerte einhalten. Um dies zu erreichen, müssen unter anderem die Brennverfahren stetig verbessert werden. Das Lean-Direct-Injection-Konzept ist eines der aussichtsreichsten Brennverfahren, um Stickoxidemissionen zu minimieren. Im Gegenzug neigen derartige Brennkammern zu thermoakustischen Flammenschwingungen. In dieser Arbeit werden die Flammenschwingungen einer Lean-Direct-Injection-Brennkammer mit einer Sprayflamme untersucht. Es wird ein direkter Vergleich der beobachteten Flammenschwingung zwischen der Sprayflamme und diversen Gasflammen gezogen. Dies lässt eine unmittelbare Bewertung einzelner Teilmechanismen, wie der Mischung, der chemischen Eigenschaften des Brennstoffs, der Spraybildung, usw. zu. Um die Spraybildung unter oszillierenden Bedingungen besser zu verstehen, werden zudem detaillierte Untersuchungen an einem separaten Zerstäubungsprüfstand am gleichen Airblast-Zerstäuber durchgeführt. Diese Untersuchungen geben Aufschluss über das Antwortverhalten des Primärzerfalls sowie der Tropfenausbreitung innerhalb der Luftströmung.

Dynamics of Droplets


Author: Arnold Frohn,Norbert Roth
Publisher: Springer Science & Business Media
ISBN: 9783540658870
Category: Science
Page: 292
View: 4276

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The book deals with the dynamical behaviour of single droplets and regular droplet systems. After a short description of the theoretical background, the different experimental facilities and methods necessary for the investigation of single droplets are described in detail. A summary of important applications is included.

Laser Techniques for Fluid Mechanics

Selected Papers from the 10th International Symposium Lisbon, Portugal July 10–13, 2000
Author: R.J. Adrian,D.F.G. Durao,M.V. Heitor,M. Maeda,Cameron Tropea,J.H. Whitelaw
Publisher: Springer Science & Business Media
ISBN: 3662082632
Category: Technology & Engineering
Page: 566
View: 1381

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This volume includes revised and extended versions of selected papers presented at the Tenth International Symposium on Applications of Laser Techniques to Fluid Mechanics held at the Calouste Gulbenkian Foundation in Lisbon, during the period of July 10 to 13, 2000. The papers describe instrumentation developments for Velocity, Scalar and Multi-Phase Flows and results of measurements of Turbulent Flows, and Combustion and Engines. The papers demonstrate the continuing and healthy interest in the development of understanding of new methodologies and implementation in terms of new instrumentation. The prime objective of the Tenth Symposium was to provide a forum for the presentation of the most advanced research on laser techniques for flow measurements, and communicate significant results to fluid mechanics. The application of laser techniques to scientific and engineering fluid flow research was emphasized, but contributions to the theory and practice of laser methods were also considered where they facilitate new improved fluid mechanic research. Attention was placed on laser-Doppler anemometry, particle sizing and other methods for the measurement of velocity and scalars, such as particle image velocimetry and laser induced fluorescence.

Compressibility, Turbulence and High Speed Flow


Author: Thomas B. Gatski,Jean-Paul Bonnet
Publisher: Elsevier
ISBN: 9780080559124
Category: Science
Page: 296
View: 3362

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This book introduces the reader to the field of compressible turbulence and compressible turbulent flows across a broad speed range through a unique complimentary treatment of both the theoretical foundations and the measurement and analysis tools currently used. For the computation of turbulent compressible flows, current methods of averaging and filtering are presented so that the reader is exposed to a consistent development of applicable equation sets for both the mean or resolved fields as well as the transport equations for the turbulent stress field. For the measurement of turbulent compressible flows, current techniques ranging from hot-wire anemometry to PIV are evaluated and limitations assessed. Characterizing dynamic features of free shear flows, including jets, mixing layers and wakes, and wall-bounded flows, including shock-turbulence and shock boundary-layer interactions, obtained from computations, experiments and simulations are discussed. Describes prediction methodologies including the Reynolds-averaged Navier Stokes (RANS) method, scale filtered methods and direct numerical simulation (DNS) Presents current measurement and data analysis techniques Discusses the linkage between experimental and computational results necessary for validation of numerical predictions Meshes the varied results of computational and experimental studies in both free and wall-bounded flows to provide an overall current view of the field

Laser Techniques Applied to Fluid Mechanics

Selected Papers from the 9th International Symposium Lisbon, Portugal, July 13–16, 1998
Author: R.J. Adrian,D.F.G. Durao,F. Durst,M.V. Heitor,M. Maeda,J.H. Whitelaw
Publisher: Springer Science & Business Media
ISBN: 3642569633
Category: Technology & Engineering
Page: 639
View: 1707

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In the tradition of its predecessors, this volume comprises a selection of the best papers presented at the Ninth International Symposium on Applications of Laser Techniques to Fluid Mechanics, held in Lisbon in July 2000. The papers reflect the state-of-the-art in laser applications of laser techniques in fluid mechanics describing novel ideas for instrumentation, instrumentation developments, results of measurements of wall-bounded flows, free flows and flames and flow and combustion in engines. The papers demonstrate the continuing interest in the development of an understanding of new methodologies and implementation in terms of new instrumentation.

Imaging Measurement Methods for Flow Analysis

Results of the DFG Priority Programme 1147 “Imaging Measurement Methods for Flow Analysis” 2003-2009
Author: Wolfgang Nitsche,Christoph Dobriloff
Publisher: Springer Science & Business Media
ISBN: 3642011063
Category: Technology & Engineering
Page: 318
View: 8625

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In 2003 the German Research Foundation established a new priority programme on the subject of “Imaging Measurement Methods for Flow Analysis” (SPP 1147). This research programme was based on the fact that experimental ?ow analysis, in addition to theory and numerics, has always played a predominant part both in ?ow research and in other areas of industrial practice. At the time, however, c- parisons with numerical tools (such as Computational Fluid Dynamics), which were increasingly used in research and practical applications, soon made it clear that there are relatively few experimental procedures which can keep up with state-of-the-art numerical methods in respect of their informative value, e.g. with regard to visu- spatial analysis or the dynamics of ?ow ?elds. The priority programme “Imaging Measurement Methods for Flow Analysis” was to help close this development gap. Hence the project was to focus on the investigation of ef?cient measurement me- ods to analyse complex spatial ?ow ?elds. Speci?c cooperations with computer sciences and especially measurement physics were to advance ?ow measurement techniques to a widely renowned key technology, exceeding the classical ?elds of ?uid mechanics by a long chalk.

LDA Application Methods

Laser Doppler Anemometry for Fluid Dynamics
Author: Zhengji Zhang
Publisher: Springer Science & Business Media
ISBN: 9783642135149
Category: Technology & Engineering
Page: 272
View: 8777

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This technical book considers the application side of LDA techniques. Starting from the basic theories that are crucial for each LDA user, the main subject of the book is focused on diverse application methods. In details, it deals with universal methodical techniques that have been mostly developed in the last 15 years. The book thus gives for the first time an application reference for LDA users in improving the optical conditions and enhancing the measurement accuracies. It also provides the guidelines for simplifying the measurements and correcting measurement errors as well as for clarifying the application limits and extending the application areas of LDA techniques. Beside the treatments of some traditional optical and flow mechanical features influencing the measurement accuracies, the book shows a broad spectrum of LDA application methods in the manner of measuring the flow turbulence, resolving the secondary flow structures, and quantifying the optical aberrations at measurements of internal flows etc.. Thus, it also supports the further developments of both the hard- and software of LDA instrumentations.

Fluid Mechanics Measurements, Second Edition


Author: R. Goldstein
Publisher: CRC Press
ISBN: 9781560323068
Category: Technology & Engineering
Page: 600
View: 946

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This revised edition provides updated fluid mechanics measurement techniques as well as a comprehensive review of flow properties required for research, development, and application. Fluid-mechanics measurements in wind tunnel studies, aeroacoustics, and turbulent mixing layers, the theory of fluid mechanics, the application of the laws of fluid mechanics to measurement techniques, techniques of thermal anemometry, laser velocimetry, volume flow measurement techniques, and fluid mechanics measurement in non-Newtonian fluids, and various other techniques are discussed.

Developments in Laser Techniques and Fluid Mechanics

Selected Papers from the 8th International Symposium, Lisbon, Portugal, 8-11 July, 1996
Author: Ronald J. Adrian
Publisher: Springer Verlag
ISBN: 9783540635727
Category: Technology & Engineering
Page: 571
View: 9530

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This volume comprises a selection of the best papers presented at the Eighth International Symposium on Applications of Laser Techniques to Fluid Mechanics, held in Lisbon in July 1996. The papers describe novel ideas for instrumentation, instrumentation developments, results of measurements of wall-bounded flows, free flows and flames and flow and combustion in engines. The papers demonstrate the continuing interest in the development of an understanding of new methodologies and implementation in terms of new instrumentation.

Applications of Laser Techniques to Fluid Mechanics

5th International Symposium Lisbon, Portugal, 9-12 July, 1990
Author: R.J. Adrian,D.F.G. Durao,F. Durst,M. Maeda,J. Whitelaw
Publisher: Springer Science & Business Media
ISBN: 3642612547
Category: Technology & Engineering
Page: 567
View: 1576

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This volume consists of papers selected from the proceedings of the Fifth International Symposium on Applications of Laser Techniques to Fluid Mechanics, held at the Calouste Gulbenkian Foundation in Lisbon from 9 to 12 July, 1990. Relative to previous meetings in the Lisbon series the scope of this symposium was broadened by expanding the topical coverage to include all laser techniques used in fluid mechanics. This change recognized the trend amongst experimental fluid dynamicists to employ laser techniques for the mea surement of many different quantities, including concentration, temperature, particle size, and velocity, and the need for researchers to have a forum in which to communicate their work and share their common interests. The Fifth Symposium contained twenty-three sessions of formal presentations and a lively Open Forum ses sion. In addition, Dr. H. J. Pfeiffer organized a special Workshop on the Use of Computers in Flow Mea surements which contained five sessions on frequency domain processors, correIa tors, special detectors, and biasing.

Laser Metrology in Fluid Mechanics

Granulometry, Temperature and Concentration Measurements
Author: Alain Boutier
Publisher: John Wiley & Sons
ISBN: 1118576950
Category: Science
Page: 368
View: 1756

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In fluid mechanics, non-intrusive measurements are fundamental in order to improve knowledge of the behavior and main physical phenomena of flows in order to further validate codes. The principles and characteristics of the different techniques available in laser metrology are described in detail in this book. Velocity, temperature and concentration measurements by spectroscopic techniques based on light scattered by molecules are achieved by different techniques: laser-induced fluorescence, coherent anti-Stokes Raman scattering using lasers and parametric sources, and absorption spectroscopy by tunable laser diodes, which are generally better suited for high velocity flows. The size determination of particles by optical means, a technique mainly applied in two-phase flows, is the subject of another chapter, along with a description of the principles of light scattering. For each technique the basic principles are given, as well as optical devices and data processing. A final chapter reminds the reader of the main safety precautions to be taken when using powerful lasers.

Springer Handbook of Experimental Fluid Mechanics


Author: Cameron Tropea,Alexander L. Yarin
Publisher: Springer Science & Business Media
ISBN: 3540251413
Category: Science
Page: 1557
View: 5413

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Accompanying DVD-ROM contains ... "all chapters of the Springer Handbook."--P. [3] of cover.

Generalized Lorenz-Mie Theories


Author: Gerard Gouesbet,Gérard Gréhan
Publisher: Springer Science & Business Media
ISBN: 9783642171949
Category: Science
Page: 308
View: 6587

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The Lorenz-Mie theory, describing the interaction between a homogeneous sphere and an electromagnetic plane wave, is likely to be one of the most famous theories in light scattering. But, with the advent of lasers and their increasing development in various fields, it has become too old-fashioned to meet most of the modern requisites. The book deals with generalized Lorenz-Mie theories when the illuminating beam is an electromagnetic arbitrary shaped beam, relying on the method of separation of variables. A particular emphasis is stressed on the case of the homogeneous sphere but other regular particles are considered too. An extensive discussion of the methods available to the evaluation of beam shape coefficients describing the illuminating beam is provided, and several methods are discussed. Applications concern many fields such as optical particle sizing and, more generally, optical particle characterization, morphology-dependent resonances, or mechanical effects of light for optical trapping, optical tweezers and optical stretchers. Various computer programs relevant to the contents of the book are furthermore provided.

Measurement in Fluid Mechanics


Author: Stavros Tavoularis
Publisher: Cambridge University Press
ISBN: 9780521815185
Category: Science
Page: 354
View: 5272

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Measurement in Fluid Mechanics is an introductory, up-to-date, general reference in experimental fluid mechanics, describing both classical and state-of-the-art methods for flow visualization and for measuring flow rate, pressure, velocity, temperature, concentration, and wall shear stress. Particularly suitable as a textbook for graduate and advanced undergraduate courses. Measurement in Fluid Mechanics is also a valuable tool for practicing engineers and applied scientists. This book is written by a single author, in a consistent and straightforward style, with plenty of clear illustrations, an extensive bibliography, and over 100 suggested exercises. Measurement in Fluid Mechanics also features extensive background materials in system response, measurement uncertainty, signal analysis, optics, fluid mechanical apparatus, and laboratory practices, which shield the reader from having to consult with a large number of primary references. Whether for instructional or reference purposes, this book is a valuable tool for the study of fluid mechanics. Stavros Tavoularis has received a Dipl. Eng. from the National Technical University of Athens, Greece, an M.Sc. from Virginia Polytechnic Institute and State University and a Ph.D. from The Johns Hopkins University. He has been a professor in the Department of Mechanical Engineering at the University of Ottawa since 1980, where he has served terms as the Department Chair and Director of the Ottawa-Carleton Institute for Mechanical and Aerospace Engineering. His research interests include turbulence structure, turbulent diffusion, vortical flows, aerodynamics, biofluid dynamics, nuclear reactor thermal hydraulics and the development of experimental methods. Professor Tavoularis is a Fellow of the Engineering Institute of Canada, a Fellow of the Canadian Society for Mechanical Engineering and a recipient of the George S. Glinski Award for Excellence in Research. Contents: Part I. General concepts: 1. Flow properties and basic principles; 2. Measuring systems; 3. Measurement uncertainty; 4. Signal conditioning, discretization, and analysis; 5. Background for optical experimentation; 6. Fluid mechanical apparatus; 7. Towards a sound experiment; Part II. Measurement techniques: 8. Measurement of flow pressure; 9. Measurement of flow rate; 10. Flow visualization techniques; 11. Measurement of local flow velocity; 12. Measurement of temperature; 13. Measurement of composition; 14. Measurement of wall shear stress; 15. Outlook.