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Phase/doppler spray analyzer for simultaneous measurements of drop size and velocity distributionsResearch was conducted on a laser light scatter detection method for measuring the size and velocity of spherical particles. The method is based upon the measurement of the interference fringe pattern produced by spheres passing through the intersection of two laser beams. A theoretical analysis of the method was carried out using the geometrical optics theory. The instrument response function was determined to be linear with drop size. Experimental verification of the theory was obtained by using monodisperse droplet streams. Several optical configurations were tested to identify all of the parametric effects upon the size measurements. Both off-axis forward-scatter and back-scatter light detection were utilized. Simulated spray environments and fuel spray nozzles were used in the evaluation of the method. The measurements of the monodisperse drops showed complete agreement with the theoretical predictions. The method was demonstrated to be independent of the beam intensity and extinction resulting from the surrounding drops. An instrument based on the concept has been developed.
Document ID
19850027884
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bachalo, W. D.
(Aerometrics, Inc. Mountain View, CA, United States)
Houser, M. J.
(Aerometrics, Inc. Mountain View, CA, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1984
Publication Information
Publication: Optical Engineering
Volume: 23
ISSN: 0091-3286
Subject Category
Instrumentation And Photography
Accession Number
85A10035
Funding Number(s)
CONTRACT_GRANT: NAS3-23684
Distribution Limits
Public
Copyright
Other

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