The Evaporation of Water Droplets in Superheated Steam

[+] Author and Article Information
Kwan Lee, D. J. Ryley

Department of Mechanical Engineering, University of Liverpool, Liverpool, England

J. Heat Transfer 90(4), 445-451 (Nov 01, 1968) (7 pages) doi:10.1115/1.3597540 History: Received October 16, 1967; Online August 25, 2011


The evaporation of a water droplet, diameter 230-1130μ, suspended on a 50μ diameter glass fiber was measured optically for the following range of variables: droplet Reynolds number 64-250, superheated steam pressure 14.7–29 psia, degrees of superheat 5–61 deg F; velocity 9–39 fps. The correlating equation was found to be

Nu = 2 + 0.74 Re0.5 Pr0.33
The apparatus and technique were proven using air as the evaporating medium. Calculations were made of the heating-up period at the beginning, and the drop asphericity at the end of a given test.

Copyright © 1968 by ASME
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