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Proceedings Paper

Relative evaporation rates of droplets in a segmented stream determined by droplet-cavity fluorescence peak shifts
Author(s): Gang Chen; Ali Serpenguzel; Richard K. Chang; William P. Acker
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Paper Abstract

The evaporated gas behind each flowing droplet affects the evaporation rate and drag of trailing droplets. For interacting droplets, we present a diagnostic technique that is capable of measuring evaporation-related droplet radius changes and drag-related flow velocity changes. When irradiated by a pump-laser beam, each dye-containing droplet acts as a laser, emitting at discrete wavelengths that correspond to morphology-dependent resonances of a sphere. Small wavelength shifts in the lasing spectra from each droplet are related to its radius change and hence, the decrease of the droplet volume. For an isolated droplet-stream segment, the evaporation rates of trailing droplets behind a lead droplet are determined.

Paper Details

Date Published: 24 May 1993
PDF: 9 pages
Proc. SPIE 1862, Laser Applications in Combustion and Combustion Diagnostics, (24 May 1993); doi: 10.1117/12.145696
Show Author Affiliations
Gang Chen, Yale Univ. (United States)
Ali Serpenguzel, Yale Univ. (United States)
Richard K. Chang, Yale Univ. (United States)
William P. Acker, Texaco Inc. (United States)

Published in SPIE Proceedings Vol. 1862:
Laser Applications in Combustion and Combustion Diagnostics
Larry C. Liou, Editor(s)

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