Type of Document Dissertation Author LePera, Stephen D Author's Email Address email@example.com URN etd-02072012-101235 Title Development of a Novel Planar Mie Scattering Method for Measurement of Spray Characteristics Degree PhD Department Mechanical Engineering Advisory Committee
Advisor Name Title Vandsburger, Uri Committee Chair Cohen, Jeffrey Committee Member Ekkad, Srinath V. Committee Member Ng, Fai Committee Member O'Brien, Walter F. Jr. Committee Member Keywords
Date of Defense 2012-02-03 Availability unrestricted AbstractThe work herein details an optical droplet measurement system based on planar multi-angle
Mie scattering. Sizing information consists of a mean droplet diameter and droplet
distribution estimates for every individual point within a planar (2D) area of interest. The
planar method makes possible the fast acquisition of data within a large field of interest, and
uses relatively inexpensive instrumentation.
As presented, the method demonstrated the ability to measure water droplets from a typical
simplex spray nozzle, across the range of 5-50 micrometers within +/-10% of known values, and in
addition return an estimate of the shape and width of the size distribution at each location
within the planar region of interest. Measurements demonstrating the agreement between
results from this current method and known PDA data were successfully completed for a
1-gallon-per-hour spray nozzle, and repeatability was demonstrated in 2.5-gallon-per-hour
and 4.5-gallon-per-hour nozzles.
Additionally the limits of the technique are explored with simulated data. Conclusions from
these exercises show that the multi-angle planar Mie scattering method is capable of measuring
droplet distribution characteristics and means within a nominal range of 0.3 micrometers up to 150 micrometers.
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