Author: William K George (Jr)Publisher:
ISBN:
Category :
Languages : en
Pages : 161
Book Description
An operational Laser-Doppler Velocimeter is described and measurements of spectra in both laminar and turbulent flow are presented. (Author).
An Analysis of the Laser Doppler Velocimeter and Its Application to the Measurement of Turbulence
Author: William K George (Jr)Publisher:
ISBN:
Category :
Languages : en
Pages : 161
Book Description
An operational Laser-Doppler Velocimeter is described and measurements of spectra in both laminar and turbulent flow are presented. (Author).
An analysis of the Laser-Doppler velocimeter and its application to the measurement of turbulence : thesis
Author: William Kenneth GeorgePublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
An Analysis of the Laser Doppler Velocimeter and Its Application to the Measurement of Turbulence
Author: William Kenneth GeorgePublisher:
ISBN:
Category : Doppler effect
Languages : en
Pages : 136
Book Description
Turbulence Measurements with a Laser Doppler Velocimeter
Author: William Joseph YantaPublisher:
ISBN:
Category : Laser Doppler velocimeter
Languages : en
Pages : 104
Book Description
Turbulence measurements with a Laser Doppler Velocimeter (LDV) using the dual scatter or differential Doppler mode have been made in a subsonic, fully developed channel flow. The measurements were made using only those light scattering particles occurring naturally in air. Results include mean velocity profiles, turbulence intensities, Reynolds stress distributions and a skewness measurement of the velocity distribution function across the channel. Statistical techniques were used to obtain the various turbulence parameters. Guidelines have been established for the amount of data needed to obtain results with a specified accuracy and confidence level. Measurements have also been made to determine the particle-size distribution. An aerodynamic means was used to determine the size distribution, in contrast to the usual optical procedures. (Modified author abstract).
Application of Laser Doppler Velocimeter to Chemical Vapor Laser System
Author: Luther R. GartrellAn Analysis of the Laser-Dopler Velocimeter and Its Application to the Measurement of Turbulence
Author: Publisher:
ISBN:
Category : Laser Doppler velocimeter
Languages : en
Pages : 274
Book Description
Laser Velocimetry in Fluid Mechanics
Author: Alain BoutierPublisher: John Wiley & Sons
ISBN: 1848213972
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.
Analysis of the Laser Doppler Measurement Technique for Application in Turbulent Flows
Author: Lodewijk Helena Jozef AbsilPublisher:
ISBN: 9789056230173
Category : Laser Doppler velocimeter
Languages : de
Pages : 320
Book Description
The Use of a Laser Doppler Velocimeter in Supersonic Flow
Author: William Joseph YantaPublisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 64
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).
Turbulence Measurements with a Laser Doppler Velocimeter
Author: William J. YantaPublisher:
ISBN:
Category : Laser Doppler velocimeter
Languages : en
Pages : 240
Book Description
Turbulence measurements with a Laser Doppler Velocimeter (LDV) using the dual scatter or differential Doppler mode have been made in a subsonic, fully developed channel flow. The measurements were made using only those light scattering particles occurring naturally in air. Results include mean velocity profiles, turbulence intensities, Reynolds stress distributions and a skewness measurement of the velocity distribution function across the channel. Statistical techniques were used to obtain the various turbulence parameters. Guidelines have been established for the amount of data needed to obtain results with a specified accuracy and confidence level. Measurements have also been made to determine the particle-size distribution. An aerodynamic means was used to determine the size distribution, in contrast to the usual optical procedures. (Modified author abstract).