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| 基于P_n近似方法的消防水幕辐射传输模拟分析 | |
| 引用本文： | 冯志力,董士奎,朱海慧,谢鸣.基于P_n近似方法的消防水幕辐射传输模拟分析[J].燕山大学学报,2011,35(4):302-308. |
| 作者姓名： | 冯志力 董士奎 朱海慧 谢鸣 |
| 作者单位： | 1. 哈尔滨市公安消防支队,黑龙江哈尔滨,150001 2. 哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨,150001 3. 哈尔滨工业大学基建处,黑龙江哈尔滨,150001 4. 哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨 150001;哈尔滨工业大学基建处,黑龙江哈尔滨 150001 |
| 基金项目： | 国家自然科学基金资助项目(50776025) |
| 摘 要： | 水幕系统对火焰辐射衰减问题包含了气体、水滴粒子、不完全燃烧产生的炭黑粒子等吸收、散射以及液滴蒸发吸热等过程。针对此问题,本文首先采用Mie散射理论与有效介质理论相结合,建立了水滴粒子以及炭黑掺杂混合液滴的吸收散射特性参数计算模型;在此基础上,考虑燃气辐射吸收作用,采用球谐函数法构造了多层半透明水幕介质的辐射传输计算模型。利用该模型分析了载液量、液滴粒径、水滴蒸发、粒子混合等因素对辐射衰减能力的影响。 |
| 关 键 词： | 消防水幕 热辐射屏蔽 多层半透明水幕模型 P_n近似方法 |
Simulative analysis of radiative heat transfer in water curtains using Pn-approximation method |
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| FENG Zhi-li,DONG Shi-kui,ZHU Hai-hui,XIE Ming.Simulative analysis of radiative heat transfer in water curtains using Pn-approximation method[J].Journal of Yanshan University,2011,35(4):302-308. | |
| Authors: | FENG Zhi-li DONG Shi-kui ZHU Hai-hui XIE Ming |
| Institution: | (2,3) (1.Fire detachment of Harbin Public Security Bureau,Harbin,Heilongjiang 150001,China;2.School of Energy Science and Engineering,Harbin Institute of Technology,Harbin,Heilongjiang 150001,China;3.Infrastructure Management Department, Harbin Institute of Technology,Harbin,Heilongjiang 150001,China) |
| Abstract: | The problem of thermal radiation shielding through water curtains is very complicated including absorption,scattering and evaporation absorbing heat processes of gases,water droplets and soot particles.In this paper,the Mie theory and effective medium theory are combined to build the model calculating absorption and scattering parameters of water droplet and mixed droplet containing soot particle,on this basis,taking into account the gases absorption effect the numerical model of radiative heat transfer in the multi-layer semitransparent water curtains are established using P_n-approximation method.By present model,the influence of droplet loading,droplet size,droplet evaporation and droplet mixing on the thermal shielding are systematically simulated and analyzed. |
| Keywords: | fire protection water curtain thermal radiation shielding multi-layer semitransparent water curtains model P_n approximation method |
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