Laser Doppler Velocimetry for Continuous Flow Solar-pumped Iodine Laser System PDF Download
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Author: Bagher M. Tabibi
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
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Book Description
Author: Bagher M. Tabibi
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
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Book Description
Author: Luther R. Gartrell
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
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Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 538
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 1484
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Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 1482
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Author: Robert J. Hallermeier
Publisher:
ISBN:
Category : Fluid dynamic measurements
Languages : en
Pages : 8
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Book Description
Author: F. N. Weber (Jr.)
Publisher:
ISBN:
Category : Laser Doppler velocimeter
Languages : en
Pages : 38
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Book Description
Author: Ricky E. Wilson
Publisher:
ISBN:
Category :
Languages : en
Pages : 52
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Book Description
A computer-integrated LDV system utilizing a Helium-Neon laser was designed, assembled and tested for use in the study of steady flow field quantities. All system elements were integrated to include a traverse mechanism, signal processing and conditioning, computer interface and display. The system was initially calibrated utilizing a rotating wheel of known velocity. Experimental flow measurement tests of the system were conducted across a conventional free jet flow and in the Naval Postgraduate School low speed wind tunnel. The flow field velocity measurements made in the wind tunnel were verified usin an existing pressure data acquisition station and a standard pitot static probe. Keywords: Laser doppler velocimetry.
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781729178720
Category : Science
Languages : en
Pages : 26
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Book Description
A laser Doppler velocimeter (LDV) system was used to measure iodide vapor flow fields inside two different-sized tubes. Typical velocity profiles across the laser tubes were obtained with an estimated +/-1 percent bias and +/-0.3 to 0.5 percent random uncertainty in the mean values and +/-2.5 percent random uncertainty in the turbulence-intensity values. Centerline velocities and turbulence intensities for various longitudinal locations ranged from 13 to 17.5 m/sec and 6 to 20 percent, respectively. In view of these findings, the effects of turbulence should be considered for flow field modeling. The LDV system provided calibration data for pressure and mass flow systems used routinely to monitor the research laser gas flow velocity. Gartrell, Luther R. and Hunter, William W., Jr. and Lee, Ja H. and Fletcher, Mark T. and Tabibi, Bagher M. Langley Research Center RTOP 505-59-54-03...
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.
