细水雾系统辅助保护玻璃分隔墙体研究

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英文篇名：Research on glass partitions wall protect by water mist system 作者：刘建泽 ; 梁强 ; 葛晓霞 ; 孙楠楠 英文作者：LIU Jian-ze;LIANG Qiang;GE Xiao-xia;SUN Nan-nan;China People's Police University; 关键词：细水雾 ; 玻璃隔墙 ; 辐射模型 ; 辐射热通量 ; 衰减效率 ; 粒径 英文关键词：water mist;;glass wall;;radiation model;;thermal radiation flux;;attenuation efficiency;;particle size 中文刊名：消防科学与技术 英文刊名：Fire Science and Technology 机构：中国人民警察大学; 出版日期：2019-02-15 出版单位：消防科学与技术 年：2019 期：02 基金：河北省自然科学基金项目(E2018507026);; 武警学院基金培育项目(ZKJJPY201619) 语种：中文; 页：43-46 页数：4 CN：12-1311/TU ISSN：1009-0029 分类号：TU998.1

摘要

介绍水雾场衰减热辐射的两通量模型,分析热辐射衰减效率的影响因素。基于FDS数值模拟,设置16种工况分析不同细水雾特征条件下玻璃背火面的热辐射通量,得出细水雾粒径对辐射热通量的影响及辐射热通量的垂直变化规律。模拟实验表明,细水雾系统对热辐射有较好的衰减作用,在流量1 L/min、喷嘴间距0.2 m、均值粒径50μm的工况下,细水雾衰减效率达到90.69%;当单喷头流量减小、喷嘴间距增大、液滴粒径增大时,细水雾的衰减效率降低。
        The two flux model of the attenuation heat radiation of water mist field was introduced,and influencing factors of the thermal radiation attenuation efficiency was analyzed. FDS was used to simulate the thermal radiation flux of the glass' s back fire surface under 16 scenarios of water mist characteristics. The influence of water mist size on radiation heat flux and the vertical variation of radiation heat flux were obtained.The simulation experiment showed that the fine water mist system had a good attenuation effect on the heat radiation. The attenuation efficiency of water mist was up to 90.69% when the flow rate was 1 L/min, the distance of the nozzle was 0.2 m and the mean particle diameter was 50 μm.The attenuation efficiency of the water mist decreased with the decrease of flow rate, the decrease of nozzle spacing and the increase of droplet size.

引文

[1]THOMAS P H.Absorption and scattering of radiation by water sprays of large drops[J].British Journal of Applied Physics,1952,3(12):385.
    [2]COPPALLE A,NEDELKA D,BAUER B.Fire protection:Water curtains[J].Fire Safety Journal,1993,20(3):241-255.
    [3]YANG W,PARKER T,LADOUCEUR H D,et al.The interaction of thermal radiation and water mist in fire suppression[J].Fire Safety Journal,2004,39(1):41-66.
    [4]邬岱杰,陈敏.细水雾幕衰减热辐射的数值模拟研究[J].火灾科学,2015,24(3):151-158.
    [5]魏东,梁强.消防水幕衰减火灾辐射热的理论研究[J].中国安全科学学报,2008,18(10):75-81.
    [6]KERAMIDA E P,KARAYANNIS A N,BOUDOUVIS A G,et al.Numerical Modeling of Radiant Heat Attenuation Through Water Mist[J].Combustion Science&Technology,2000,159(1):351-371.
    [7]BEROUR N,LACROIX D,BOULET P,et al.Radiative and conductive heat transfer in a nongrey semitransparent medium.Application to fire protection curtains[J].Journal of Quantitative Spectroscopy&Radiative Transfer,2004,86(1):9-30.
    [8]HAO J,LIMING R,TAN H.Effect of anisotropic scattering on radiative heat transfer in two-dimensional rectangular media[J].Journal of Quantitative Spectroscopy&Radiative Transfer,2003,78(2):151-161.
    [9]TRIVIC D N,O’BRIEN T J,AMON C H.Modeling the radiation of anisotropically scattering media by coupling Mie theory with finite volume method[J].International Journal of Heat&Mass Transfer,2004,47(26):5765-5780.
    [10]RAVIGURURAJAN T S,BELTRAN M R.A model for attenuation of fire radiation through water droplets[J].Fire Safety Journal,1989,15(2):171-181.
    [11]谈和平.红外辐射特性与传输的数值计算:计算热辐射学[M].哈尔滨:哈尔滨工业大学出版社,2006.
    [12]马千里,倪照鹏,黄鑫,等.大型商业建筑室内步行街商铺火灾荷载调查研究[J].中国安全生产科学技术,2011,7(4):52-56.
    [13]谭琼.火灾场景下细水雾幕保护窗玻璃的实验研究[D].合肥:中国科学技术大学,2017.
    [14]丛北华,蔡志刚,陈吕义,等.细水雾阻隔火焰热辐射的模拟研究[J].中国安全科学学报,2005,15(12):69-73.