Design and Application of a Laser Velocimeter for Particle Velocity Measurements PDF Download
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Author: Michael Edward Thompson
Publisher:
ISBN:
Category :
Languages : en
Pages : 124
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Book Description
Author: Michael Edward Thompson
Publisher:
ISBN:
Category :
Languages : en
Pages : 124
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Book Description
Author: Alain Boutier
Publisher: John Wiley & Sons
ISBN: 1118569334
Category : Science
Languages : en
Pages : 436
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Book Description
In fluid mechanics, velocity measurement is fundamental in order to improve the behavior knowledge of the flow. Velocity maps help us to understand the mean flow structure and its fluctuations, in order to further validate codes. Laser velocimetry is an optical technique for velocity measurements; it is based on light scattering by tiny particles assumed to follow the flow, which allows the local fluid flow velocity and its fluctuations to be determined. It is a widely used non-intrusive technique to measure velocities in fluid flows, either locally or in a map. This book presents the various techniques of laser velocimetry, as well as their specific qualities: local measurements or in plane maps, mean or instantaneous values, 3D measurements. Flow seeding with particles is described with currently used products, as well as the appropriate aerosol generators. Post-processing of data allows us to extract synthetic information from measurements and to perform comparisons with results issued from CFD codes. The principles and characteristics of the different available techniques, all based on the scattering of light by tiny particles embedded in the flow, are described in detail; showing how they deliver different information, either locally or in a map, mean values and turbulence characteristics.
Author: William Joseph Yanta
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 64
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Book Description
Results are presented for an experimental program which investigated the application of an LDV technique in supersonic flows. This paper presents an analysis of the behavior of light-scattering particles in rapidly accelerating or shock decelerated flows, an evaluation of particle production techniques and the results of several velocity measurements. Measurements included the velocity distribution along the nozzle centerline and flow over a diamond airfoil in a Mach 3 tunnel and velocity profiles for a turbulent boundary layer in a Mach 4.8 facility. It is demonstrated that LDV measurements can be made consistently with errors of less than five percent if the particle lag is considered. (Author).
Author: James D. Trolinger
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
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Book Description
A laser velocimeter was developed for the measurement of the velocity of particles in the size range from 10 to 100 micrometers diameter and velocities up to 5000 meters per second. The instrument was successfully employed in accelerator tests which were conducted during the development of a reentry nose tip erosion and ablation facility. (Author).
Author: Jean-Christophe Valière
Publisher: John Wiley & Sons
ISBN: 1118649354
Category : Technology & Engineering
Languages : en
Pages : 168
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Book Description
This book concerns the presentation of particle velocity measurement for acoustics using lasers, including Laser Doppler Velocimetry (LDV or Anemometry (LDA)) and Particle Imagery Velocimetry (PIV). The objective is first to present the importance of measuring the acoustic velocity, especially when the acoustic equations are nonlinear as well as characterizing the near fields. However, these applications need to use non-invasive sensors. Some optical techniques, initially developed for fluid mechanics, have been adapted to the field of acoustics in recent years. This book summarizes 15 years of research in this area, highlighting the improvements that have been made, particularly in signal processing, and showing applications for which they have proven to be a carrier of innovation.
Author: H.-E. Albrecht
Publisher: Springer Science & Business Media
ISBN: 3662051656
Category : Science
Languages : en
Pages : 741
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Book Description
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.
Author: Markus Raffel
Publisher: Springer Science & Business Media
ISBN: 9783540636830
Category : Science
Languages : en
Pages : 280
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Book Description
Results from several applications of particle image velocimetry (PIV) to unsteady flows at a laboratory scale have been published, and commercial products are now available for more general laboratory use, but for certain industrially important applications, reliable equipment is often available only from in-house research and development teams. This PIV handbookis intended to transfer know-how from PIV development laboratories to end-users in industry and universities. The book discusses the scientific and technical aspects required to set up a PIV system, allows users to assess the problems involved in the application of PIV, and enables them to design, optimize, and use PIV systems to meet their special needs.
Author: Howard Doyle Thompson
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 586
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Book Description
Contents: A Historical Review of Laser Velocimetry. Developments in Instrumentation, Data Analysis, Combustion Measurements, Measurements in Turbulent Flows, Measurements in Internal Combustion Engines, General Applications, Particle Diagnostics, Wild Card Session, and Panel Discussion.
Author: Luther R. Gartrell
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
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Book Description
Author: Robert J. Hallermeier
Publisher:
ISBN:
Category : Fluid dynamic measurements
Languages : en
Pages : 8
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Book Description
