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A method for modeling the mitigation of hazardous fire thermal radiation by water spray curtains
The radiative transfer model describing the interactions between hazardous fire thermal radiation and water sprays is presented. Both the liquid water droplets and gaseous phases, mainly water vapor and carbon dioxide, of the spray are considered. Radiative properties of the polydisperse water droplets are dervied from Mie theory. The gaseous phase behavior is handled by the correlated-k distribution method, where the k-distribution function is evaluated for Malkmus narrow-band statistical model. The radiative transfer equation, in its integral form, is solved by a discrete ordinates method. After a general description of the radiative model developed and the experimental task to validate it, some results are discussed on its accuracy and processing time. A deeper analysis is also carried out to point out the influence of the main parameters involved in the problem. The two phase spray analysis model showed good accuracy and computational efficiency as compared to previous results for a one-dimensional transfer, and experimental data for a sprayer TG03 in industrial use. Droplet size, droplet concentration, and water molar fraction are main parameters controlling spray attenuation ability.
A method for modeling the mitigation of hazardous fire thermal radiation by water spray curtains
The radiative transfer model describing the interactions between hazardous fire thermal radiation and water sprays is presented. Both the liquid water droplets and gaseous phases, mainly water vapor and carbon dioxide, of the spray are considered. Radiative properties of the polydisperse water droplets are dervied from Mie theory. The gaseous phase behavior is handled by the correlated-k distribution method, where the k-distribution function is evaluated for Malkmus narrow-band statistical model. The radiative transfer equation, in its integral form, is solved by a discrete ordinates method. After a general description of the radiative model developed and the experimental task to validate it, some results are discussed on its accuracy and processing time. A deeper analysis is also carried out to point out the influence of the main parameters involved in the problem. The two phase spray analysis model showed good accuracy and computational efficiency as compared to previous results for a one-dimensional transfer, and experimental data for a sprayer TG03 in industrial use. Droplet size, droplet concentration, and water molar fraction are main parameters controlling spray attenuation ability.
A method for modeling the mitigation of hazardous fire thermal radiation by water spray curtains
Verfahren zur Modellierung der Minderung der thermischen Strahlung bei Schadensfeuern durch Spritzwasserschleier
Dembele, S. (author) / Delmas, A. (author) / Sacadura, J.F. (author)
Transactions of the ASME, Journal of Heat Transfer ; 119 ; 746-753
1997
8 Seiten, 9 Bilder, 17 Quellen
Article (Journal)
English
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