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Response of two-phase droplets to intense electromagnetic radiationThe response of two-phase droplets to intense radiant heating is studied to determine the incident power that is required for causing explosive boiling in the liquid phase. The droplets studied consist of strongly absorbing coal particles dispersed in a weakly absorbing water medium. Experiments are performed by confining droplets (radii of 37, 55, and 80 microns) electrodynamically and irradiating them from two sides with pulsed laser beams. Emphasis is placed on the transition region from accelerated droplet vaporization to droplet superheating and explosive boiling. The time scale observed for explosive boiling is more than 2 orders of magnitude longer than published values for pure liquids. The delayed response is the result of energy transfer limitations between the absorbing solid phase and the surrounding liquid.
Document ID
19930052191
Document Type
Reprint (Version printed in journal)
Authors
Spann, James F. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Maloney, Daniel J. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Lawson, William F. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Casleton, Kent H. (DOE, Morgantown Energy Technology Center WV, United States)
Date Acquired
August 16, 2013
Publication Date
April 20, 1993
Publication Information
Publication: Applied Optics
Volume: 32
Issue: 12
ISSN: 0003-6935
Subject Category
OPTICS
Distribution Limits
Public
Copyright
Other