Laser Doppler and Phase Doppler Measurement Techniques

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Author: H.-E. Albrecht,Nils Damaschke,Michael Borys,Cameron Tropea

Publisher: Springer Science & Business Media

ISBN: 3662051656

Category: Technology & Engineering

Page: 738

View: 941

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

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Author: Marcus Wolff

Publisher: Walter de Gruyter GmbH & Co KG

ISBN: 311047784X

Category: Technology & Engineering

Page: 362

View: 6125

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

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Author: Enrico Bärow

Publisher: Logos Verlag Berlin GmbH

ISBN: 3832547312

Category: Technology & Engineering

Page: 132

View: 1996

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

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Author: Arnold Frohn,Norbert Roth

Publisher: Springer Science & Business Media

ISBN: 9783540658870

Category: Science

Page: 292

View: 5249

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

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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: 2692

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

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Author: Thomas B. Gatski,Jean-Paul Bonnet

Publisher: Elsevier

ISBN: 9780080559124

Category: Science

Page: 296

View: 858

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

Grundlagen der Strömungsmechanik

Eine Einführung in die Theorie der Strömung von Fluiden

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Author: Franz Durst

Publisher: Springer-Verlag

ISBN: 3540313249

Category: Science

Page: 758

View: 9654

Dieses Lehrbuch stützt sich auf mathematische und physikalische Grundkenntnisse von Studenten mittlerer Semester. Es erläutert den Zusammenhang moderner Strömungsmechanik zur technischen Mechanik und bezieht moderne Mess- und numerische Berechnungsverfahren ein. Jedes Kapitel enthält den Stoff einer einwöchigen Vorlesung, der so aufgebaut ist, dass er Studenten an die jeweilige Spezialliteratur heranführt.

Laser Techniques Applied to Fluid Mechanics

Selected Papers from the 9th International Symposium Lisbon, Portugal, July 13–16, 1998

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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: 5397

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.

Applications of Laser Techniques to Fluid Mechanics

5th International Symposium Lisbon, Portugal, 9-12 July, 1990

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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: 5130

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.

LDA Application Methods

Laser Doppler Anemometry for Fluid Dynamics

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Author: Zhengji Zhang

Publisher: Springer Science & Business Media

ISBN: 9783642135149

Category: Technology & Engineering

Page: 272

View: 1387

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

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Author: R. Goldstein

Publisher: CRC Press

ISBN: 9781560323068

Category: Technology & Engineering

Page: 600

View: 5400

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

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Author: Ronald J. Adrian

Publisher: Springer Verlag

ISBN: 9783540635727

Category: Technology & Engineering

Page: 571

View: 3245

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.

Einführung in die Strömungsmeßtechnik

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Author: Helmut Eckelmann

Publisher: Springer-Verlag

ISBN: 3663098826

Category: Technology & Engineering

Page: 352

View: 5037

Der behandelte Stoff gliedert sich in fünf Teile: Mechanische Meßmethoden - Elektromechanische Wandler und Messung von Schwankungsgrößen - Optische Meßmethoden - Methoden der Strömungssichtbarmachung - Versuchsanlagen für Modelluntersuchungen

Laser Metrology in Fluid Mechanics

Granulometry, Temperature and Concentration Measurements

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Author: Alain Boutier

Publisher: John Wiley & Sons

ISBN: 1118576950

Category: Science

Page: 368

View: 8919

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

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Author: Cameron Tropea,Alexander L. Yarin

Publisher: Springer Science & Business Media

ISBN: 3540251413

Category: Science

Page: 1557

View: 8261

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