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SHIELDING OF FIRE RADIATION WITH THE USE OF MULTI-LAYERED WATER MIST CURTAINS: PRELIMINARY ESTIMATES

DOI: 10.1615/RAD-16.170
pages 134-143

Leonid A. Dombrovsky
Joint Institute for High Temperatures, 17A Krasnokazarmennaya Str., Moscow, 111116, Russia; Tyumen State University, 6 Volodarsky Str., Tyumen, 625003, Russia

Siaka Dembele
Fire, Explosion and Fluid Dynamics Research Group, School of Mechanical and Automotive Engineering, Kingston University, London SW15 3DW, UK

Jennifer X. Wen
Faculty of Engineering, Kingston University, Friars Avenue, Roehampton Vale, London, SW15 3DW, United Kingdom; School of Engineering, University of Warwick, Coventry CV4 7AL, UK

Abstract

An approximate solution for the complete problem of attenuation of fire radiation by water mist is presented. This solution is based on simplified approaches for the spectral radiative properties of water droplets, the radiative transfer in the absorbing and scattering mist, and transient heat transfer taking into account partial evaporation of water mist. An analysis of the example problem makes it possible to recommend a decrease in the size of supplied water droplets with the distance from the irradiated surface of the mist layer. This can be achieved with the use of multilayered mist curtain. The advantage of this engineering solution is also confirmed by numerical calculations.

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