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Size Prediction of Spray Drops Disintegrated From Subcooled Liquid Sheet in Condensable Environment

[+] Author Affiliations
Kwang Uoong Koh, Sang Yong Lee

Korea Advanced Institute of Science and Technology, Daejeon, Korea

Paper No. IMECE2003-41337, pp. 39-48; 10 pages
doi:10.1115/IMECE2003-41337
From:
  • ASME 2003 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 4
  • Washington, DC, USA, November 15–21, 2003
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3718-1 | eISBN: 0-7918-4663-6, 0-7918-4664-4, 0-7918-4665-2
  • Copyright © 2003 by ASME

abstract

A simple procedure to predict the mean drop size of condensing sprays is suggested, considering the liquid sheet perforation. A series of experiments were performed to measure the mean drop size (Sauter mean diameter, SMD) and the rate of perforation, and the relationship between those two was examined. The cross-section area-averaged SMD appeared smaller with the higher liquid flow rate and temperature. The perforation number density increased with the liquid flow rate. The effect of the liquid temperature appeared relatively insignificant as the liquid flow rate became higher. The average size (diameter) of the liquid threads at the edge of the ‘web-shaped’ liquid sheet was estimated from the average size and the number density of the holes generated by perforation, and was correlated to the drop diameters. The predicted drop sizes were in agreement with the measured ones within accuracy of ±51%.

Copyright © 2003 by ASME
Topics: Drops , Sprays , Subcooling

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