A simplified model for the shielding of fire thermal radiation by water mists
A simplified model for the shielding of fire thermal radiation by water mists
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DOI：
10.1016/j.ijheatmasstransfer.2016.01.028
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发表时间：
2016-05-01
影响因子：
5.2
通讯作者：
Wen, Jennifer X.
中科院分区：
文献类型：
--
作者：
Dombrovsky, Leonid A.;Dembele, Siaka;Wen, Jennifer X.
提出了细水雾对火灾辐射衰减的完整问题的一种解法。该解决方案是基于简化的方法的水滴的光谱辐射特性，在吸收和散射雾的辐射传输，并考虑到部分蒸发的水雾和瞬态传热。传统的模型问题的计算研究表明的主要参数的作用，使一个制定一些建议，以优化可能的工程解决方案。开发的方法也适用于更现实的案例研究的真实的火灾。建议随着距雾层照射表面的距离的增加，减小所供给的水滴的尺寸。数值计算证实了这种工程解决方案的优势。根据米氏理论计算，分析了微波监测细水雾参数的可能性。(C)2016爱思唯尔有限公司版权所有
A 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. A computational study of the conventional model problem indicates the role of the main parameters and enables one to formulate some recommendations to optimize possible engineering solutions. The method developed is also applied to more realistic case study of a real fire. It is suggested to decrease the size of supplied water droplets with the distance from the irradiated surface of the mist layer. The advantage of this engineering solution is confirmed by numerical calculations. Potential possibility of microwave monitoring of water mist parameters is analyzed on the basis of Mie theory calculations. (C) 2016 Elsevier Ltd. All rights reserved.