Applications of Laser Doppler Techniques for Measurements in Large Flow Systems PDF Download
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Author:
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Languages : en
Pages :
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Author:
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Category :
Languages : en
Pages :
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Author: R. D. Lewis
Publisher:
ISBN:
Category : Fluid dynamics
Languages : en
Pages : 186
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The objective of the study was to develop the theoretical and experimental knowledge necessary to utilize the laser Doppler velocity measurement technique in large flow systems. Theoretical treatments were developed to allow prediction of the capabilities and limitations of the laser Doppler technique as applied to (1) use in the backscatter mode with no artificial contaminants in the flow; (2) localization of the measurement volume and its effects on the measurement of turbulence phenomena; and (3) degradation of the heterodyning efficiency due to long path lengths in optically inhomogeneous media. Experimental confirmation of theoretical predictions were carried out to demonstrate validity or to establish an experimental technique. (Author).
Author: H.-E. Albrecht
Publisher: Springer Science & Business Media
ISBN: 3662051656
Category : Science
Languages : en
Pages : 741
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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: H.-E. Albrecht
Publisher: Springer
ISBN: 9783662051665
Category : Technology & Engineering
Languages : en
Pages : 738
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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: Luther R. Gartrell
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
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Author: Stanford University. Department of Aeronautics and Astronautics
Publisher:
ISBN:
Category :
Languages : en
Pages : 362
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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.
Author: Stanford University. Department of Aeronautics and Astronautics
Publisher:
ISBN:
Category : Doppler effect
Languages : en
Pages : 186
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Author: William Joseph Yanta
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 64
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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: Robert Nichols James
Publisher:
ISBN:
Category : Doppler effect
Languages : en
Pages : 247
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Author: L. E. Drain
Publisher: John Wiley & Sons
ISBN:
Category : Science
Languages : en
Pages : 264
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