Author: R. H. BarkerPublisher:
ISBN:
Category : Laser Doppler velocimeter
Languages : en
Pages : 55
Book Description
The Development of a Laser-doppler Velocity Meter for the Measurement of Solid Particle Velocity in a Two-phase Flow
Author: R. H. BarkerPublisher:
ISBN:
Category : Laser Doppler velocimeter
Languages : en
Pages : 55
Book Description
The Development of a Laser-doppler Velocity Meter FPR the Measurement of Solid Particle Velocity in a Two-phase Flow
Author: R.H. BarkerDevelopment, Application, and Design Specifications of a Laser Doppler Particle Sensor for the Measurement of Particle Velocities in Two Phase Rocket Exhausts, Volume I.
Author: Stanford University. Department of Aeronautics and AstronauticsPublisher:
ISBN:
Category :
Languages : en
Pages : 200
Book Description
In this report, the development of a prototype instrument to measure the velocity of particles in the exhaust of a solid rocket motor is described. The measurement technique is based upon the doppler-shifted scattering of a focused laser beam by the particle matter in a flow. The absolute value of frequency is converted into velocity information by a Fabry Perot interferometer, photomultiplier, electronic signal processing circuits and a suitable recording device. The recorded data is in the form of signal number count rate and maximum signal amplitude as a function of velocity at a specific point in the flow. This volume describes the development of the prototype instrument. (Author).
Development of a Laser Doppler Anemometer Technique for the Measurement of Two Phase Dispersed Flow
Author: Jagannathan SrinivasanPublisher:
ISBN:
Category : Laser Doppler velocimeter
Languages : en
Pages : 212
Book Description
Application of a Laser-doppler Technique to the Measurement of Particle Velocity in Gas-particle Two-phase Flow
Author: Stanford University. Department of Aeronautics and AstronauticsPublisher:
ISBN:
Category :
Languages : en
Pages : 362
Book Description
In chemical propulsion, the use of metallic fuel constituents burning to particulate refractory oxides in rocket engines has forced attention to the understanding of two-phase nozzle expansion processes. In this study light from a helium-neon laser was reflected both from a fixed target and from moving particles. A lens concentrated the laser light and the light back-scattered from the particles was picked up by the same lens and directed into a Fabry-Perot scanning plate interferometer. The interferometer limited observation at any moment to those particles whose Doppler shifted frequency coincided with the interferometer transmission frequency. The light from the fixed target provided a frequency reference system, and calibrated movement of the interferometer mirror spacing provided continuous examination of velocity. Data in the form of lightscattering and number count vs velocity has been obtained for water droplets in subsonic flow, for aluminum spheres and alumina abrasive in cold supersonic flow and for aluminum and magnesium oxide in hot supersonic flow. Number count-velocity data was found to be a complicated function of particle size distribution and vector velocity distribution as well as instrument characteristics.
Scientific and Technical Aerospace Reports
Author: Laser Doppler and Phase Doppler Measurement Techniques
Author: H.-E. AlbrechtPublisher: 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.
Initial Discussion of the Application of a Laser-doppler Technique to the Measurement of Particle Velocity in Gas-particle Two-phase Flow
Author: Stanford University. Department of Aeronautics and AstronauticsPublisher:
ISBN:
Category : Doppler effect
Languages : en
Pages : 186
Book Description
Development Testing and Application of a Three-dimensional Laser Doppler Velocimeter for the Measurement of Gas Flows
Author: C. E. FullerThe 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).