Measurements and Numerical Predictions of Liquid Agent Dispersal Around Solid Obstacles.
Measurements and Numerical Predictions of Liquid Agent
Dispersal Around Solid Obstacles.
Presser, C.; Widmann, J. F.; DesJardin, P. E.; Gritzo,
Halon Options Technical Working Conference. Proceedings.
HOTWC 2001. Sponsored by: University of New Mexico,
Fire Suppression Systems Assoc., Fire and Safety Group,
GlobeTech, Inc., Halon Alternative Research Corp.,
Hughes Associates, Inc., Kidde, plc., Modular
Protection, Corp., Next Generation Fire Suppression
Technology Program, Sandia National Laboratories, Summit
Environmental Corp., Inc. and 3M Specialty Materials.
April 24-26, 2001, Albuquerque, NM, Daniels, B. L.;
Cole, D. G., Editor(s)(s), 122-130 pp, 2001.
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halon alternatives; computational fluid dynamics;
validation; turbulence; fire suppression; droplets;
The focus of this effort is to investigate the dispersal
of liquid agents around solid obstacles, and obtain a
better understanding of the physical processes of
droplet transport in cluttered spaces. A combined
experimental-numerical study is presented to examine the
flow field dynamics of highly turbulent flow over
obstacles, and spray transport in such flow fields.
Comparison of numerical predictions to the Particle
imaging velocimetry (PIV) measurements shows good
qualitative agreement in spatial distribution of the
mean and RMS velocities with a 20% overprediction in
mean streamwise velocity and 15% underprediction in RMS.
A numerical sensitivity study using HFE-7100 agent
reveals a strong dependency of droplet penetration on
initial droplet size for the flow range and droplet
sizes of interest in practical agent delivery systems.