Flow Field Measurement Using Raman and LDV Techniques PDF Download
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Author: S. Lederman
Publisher:
ISBN:
Category : Laser Doppler velocimeter
Languages : en
Pages : 60
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Book Description
The application of spontaneous Raman, Coherent Antistokes Raman Scattering (CARS) and Laser Doppler Velocimeters (LDV) techniques to a wide spectrum of flow fields confirms the basis hypothesis, that these laser based diagnostic techniques have a very wide range of applicability and can be instrumental in providing experimental data in friendly as well as hostile environments unobtainable by conventional means. The data can be obtained non-intrusively and remotely. (Author).
Author: S. Lederman
Publisher:
ISBN:
Category : Laser Doppler velocimeter
Languages : en
Pages : 60
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Book Description
The application of spontaneous Raman, Coherent Antistokes Raman Scattering (CARS) and Laser Doppler Velocimeters (LDV) techniques to a wide spectrum of flow fields confirms the basis hypothesis, that these laser based diagnostic techniques have a very wide range of applicability and can be instrumental in providing experimental data in friendly as well as hostile environments unobtainable by conventional means. The data can be obtained non-intrusively and remotely. (Author).
Author: Franz Mayinger
Publisher: Springer Science & Business Media
ISBN: 3662029677
Category : Science
Languages : en
Pages : 462
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Book Description
Increasing possibilities of computer-aided data processing have caused a new revival of optical techniques in many areas of mechanical and chemical en gineering. Optical methods have a long tradition in heat and mass transfer and in fluid dynamics. Global experimental information is not sufficient for developing constitution equations to describe complicated phenomena in fluid dynamics or in transfer processes by a computer program . Furthermore, a detailed insight with high local and temporal resolution into the thermo-and fluiddynamic situations is necessary. Sets of equations for computer program in thermo dynamics and fluid dynamics usually consist of two types of formulations: a first one derived from the conservation laws for mass, energy and momentum, and a second one mathematically modelling transport processes like laminar or turbulent diffusion. For reliably predicting the heat transfer, for example, the velocity and temperature field in the boundary layer must be known, or a physically realistic and widely valid correlation describing the turbulence must be avail able. For a better understanding of combustion processes it is necessary to know the local concentration and temperature just ahead of the flame and in the ignition zone.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 772
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Book Description
Author: Ricky E. Wilson
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
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Book Description
A computer-integrated LDV system utilizing a Helium-Neon laser was designed, assembled and tested for use in the study of steady flow field quantities. All system elements were integrated to include a traverse mechanism, signal processing and conditioning, computer interface and display. The system was initially calibrated utilizing a rotating wheel of known velocity. Experimental flow measurement tests of the system were conducted across a conventional free jet flow and in the Naval Postgraduate School low speed wind tunnel. The flow field velocity measurements made in the wind tunnel were verified usin an existing pressure data acquisition station and a standard pitot static probe. Keywords: Laser doppler velocimetry.
Author: Wolfgang Nitsche
Publisher: Springer Science & Business Media
ISBN: 3642011063
Category : Technology & Engineering
Languages : en
Pages : 335
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Book Description
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.
Author: S. Lederman
Publisher:
ISBN:
Category :
Languages : en
Pages : 60
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Book Description
The recently developed Laser Raman, Laser Doppler Velocimetry and Coherent Antistokes Raman Scattering are applied to the diagnostics of flow fields and flames. The concentration of species in a cold jet, and the velocities are measured and compared to measurements using standard techniques. The Raman and LDV techniques are then applied to diffusion flames. Experimental results concerning concentration of species, temperature, velocities and turbulent intensities are obtained simultaneously. The latter are obtained from the LDV data as well as the concentration data. It is seen that by proper processing of the concentration data an indication and a measure of the turbulent intensity may be obtained. It is further shown that from the simultaneously acquired concentration data a parameter of major importance in turbulence modeling, the mixedness parameter or the cross correlation function may be directly measured. (Author).
Author: R.J. Adrian
Publisher: Springer Science & Business Media
ISBN: 3642569633
Category : Technology & Engineering
Languages : en
Pages : 624
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Book Description
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.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 200
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Book Description
Author: Ronald M. C. So
Publisher:
ISBN:
Category : Combustion engineering
Languages : en
Pages : 312
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Book Description
Author: Tae-Woo Lee
Publisher: CRC Press
ISBN:
Category : Science
Languages : en
Pages : 408
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Book Description
Thermal and Flow Measurements" integrates thermal, flow, and chemical parameters to provide a foundation for applying diagnostic methods in various fields. The book shows how measurements of thermal and flow parameters, such as velocity, temperature, and pressure, are made using various instrumentation. It explains the fundamental operating principles behind the methodology so that extrapolations to emerging methods can be readily made. This comprehensive text encompasses a broad range of disciplines, including chemical engineering, aerospace engineering, and mechanical engineering, that conduct experimental measurements with thermal, flow, and chemical parameters.
