Droplet Sizing Using the Shifrin Inversion

A method for measuring droplet size distributions was investigated with an emphasis on limitations related to measurements in real spray environments. The method stores a photographic image of a plane of droplets within a spray and is capable of evaluating particle size distributions within the spra...

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Bibliographic Details
Published in:Journal of fluids engineering 1994-06, Vol.116 (2), p.357-362
Main Authors: Albert, R, Farrell, P. V
Format: Article
Language:English
Subjects:
440800 - Miscellaneous Instrumentation- (1990-)
Aerosols
Aerosols and foams
Chemistry
Colloidal state and disperse state
DROPLETS
Drops and bubbles
ELECTROMAGNETIC RADIATION
Exact sciences and technology
Fluid dynamics
FLUID FLOW
Fundamental areas of phenomenology (including applications)
General and physical chemistry
Instrumentation for fluid dynamics
LASER RADIATION
MEASURING METHODS
Nonhomogeneous flows
OTHER INSTRUMENTATION
PARTICLE SIZE
PARTICLES
Physics
RADIATIONS
SIZE
TWO-PHASE FLOW
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Description
Summary:A method for measuring droplet size distributions was investigated with an emphasis on limitations related to measurements in real spray environments. The method stores a photographic image of a plane of droplets within a spray and is capable of evaluating particle size distributions within the spray, one small region at a time. The method complements droplet velocity measurements made using Particle Image Velocimetry. In a typical experiment, a plane of the spray was illuminated by a laser light sheet and photographed. After processing, a small laser beam scanned the film and a diffraction pattern was generated for each region illuminated by the small laser. The diffraction pattern was inverted using a Shifrin inversion to solve for the particle size distribution within the illuminated region. In this paper we will discuss some of the limitations of this method and indicate one approach which seems to allow for improved inversions using data signal processing.
ISSN:0098-2202
1528-901X
DOI:10.1115/1.2910281