Author: Howard Doyle Thompson
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 586
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.
Laser Velocimetry and Particle Sizing
Author: Howard Doyle Thompson
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 586
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.
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 586
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.
Particle Sizing Experiments with the Laser Doppler Velocimeter
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Measurement techniques for in-situ simultaneous measurements of particle size distributions and particle velocities using the dual beam laser Doppler velocimeter (LV) were analytically and experimentally investigated. This investigation examined the different signal characteristics of the LV for determination of particle size and particle velocity, simultaneously. The different size related signal components were evaluated not only singularly but also as simultaneous measurements to determine which characteristic, or combination of characteristics, provided the best measure of particle size. The evaluation concentrated on the 0.5 to 5 .mu.m particle size range, in which the LV light scattering characteristics are complex often non-monotonic functions of the particle size as well as functions of index of refraction, the laser light wavelength, laser intensity and polarization, and the location and response characteristics of the detector. Different components of the LV signal were considered, but analysis concentrated on Doppler phase, visibility and scatter-intensity because they show the greatest promise. These signals characteristics were initially defined analytically for numerous optical configurations over the 0.5 to 5 .mu.m diameter range with 0.1 .mu.m segmentation, for refractive index values from 1.0 to 3.0 with absorptive (imaginary) components varied form 0 to 1.0. Collector orientation and effective f/No., as well as fringe spacing, beam polarization and wavelength, were varied in this analytical evaluation. 18 refs., 42 figs., 5 tabs.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Measurement techniques for in-situ simultaneous measurements of particle size distributions and particle velocities using the dual beam laser Doppler velocimeter (LV) were analytically and experimentally investigated. This investigation examined the different signal characteristics of the LV for determination of particle size and particle velocity, simultaneously. The different size related signal components were evaluated not only singularly but also as simultaneous measurements to determine which characteristic, or combination of characteristics, provided the best measure of particle size. The evaluation concentrated on the 0.5 to 5 .mu.m particle size range, in which the LV light scattering characteristics are complex often non-monotonic functions of the particle size as well as functions of index of refraction, the laser light wavelength, laser intensity and polarization, and the location and response characteristics of the detector. Different components of the LV signal were considered, but analysis concentrated on Doppler phase, visibility and scatter-intensity because they show the greatest promise. These signals characteristics were initially defined analytically for numerous optical configurations over the 0.5 to 5 .mu.m diameter range with 0.1 .mu.m segmentation, for refractive index values from 1.0 to 3.0 with absorptive (imaginary) components varied form 0 to 1.0. Collector orientation and effective f/No., as well as fringe spacing, beam polarization and wavelength, were varied in this analytical evaluation. 18 refs., 42 figs., 5 tabs.
Particle Sizing and Counting by Single Beam Laser Light Scattering and Laser Doppler Velocimetry
Author: Fahimeh Zarrin
Publisher:
ISBN:
Category : Laser Doppler velocimeter
Languages : en
Pages : 270
Book Description
Publisher:
ISBN:
Category : Laser Doppler velocimeter
Languages : en
Pages : 270
Book Description
Investigation of Particle-size Determination from the Optical Response of a Laser-doppler Velocimeter
Author: Dana G. Andrews
Publisher:
ISBN:
Category : Doppler effect
Languages : en
Pages : 86
Book Description
The intensity of laser light back-scattered from a particle and transmitted by a Fabry-Perot interferometer is used to determine particle-size. The instrument's optics and electronics are calibrated by examining stationary particles of known diameter resting on a non-reflective glass slide. The response of the instrument is determined by comparing measured intensities with theoretical values calculated as a complex function of particle size, refractive index and ray geometry. The results show that the measured intensities do approximate the theoretical variation with particle size and in the range of particle diameters measured (1-10 microns), the error is less than one micron. (Author).
Publisher:
ISBN:
Category : Doppler effect
Languages : en
Pages : 86
Book Description
The intensity of laser light back-scattered from a particle and transmitted by a Fabry-Perot interferometer is used to determine particle-size. The instrument's optics and electronics are calibrated by examining stationary particles of known diameter resting on a non-reflective glass slide. The response of the instrument is determined by comparing measured intensities with theoretical values calculated as a complex function of particle size, refractive index and ray geometry. The results show that the measured intensities do approximate the theoretical variation with particle size and in the range of particle diameters measured (1-10 microns), the error is less than one micron. (Author).
Laser Velocimetry and Particle Sizing
Laser Velocimetry in Fluid Mechanics
Author: Alain Boutier
Publisher: John Wiley & Sons
ISBN: 1118569334
Category : Science
Languages : en
Pages : 436
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.
Publisher: John Wiley & Sons
ISBN: 1118569334
Category : Science
Languages : en
Pages : 436
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.
Laser Velocimetry and Particle Sizing
Laser Doppler and Phase Doppler Measurement Techniques
Author: H.-E. Albrecht
Publisher: Springer Science & Business Media
ISBN: 3662051656
Category : Science
Languages : en
Pages : 741
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.
Publisher: Springer Science & Business Media
ISBN: 3662051656
Category : Science
Languages : en
Pages : 741
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.