2008年 第10卷 第10期
细水雾与火灾烟气相互作用的实验和数值模拟研究
中国科学技术大学火灾科学国家重点实验室，合肥 230027
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摘要
通过模拟实验研究了细水雾与火灾烟气的相互作用，揭示了细水雾作用下烟气温度及组分浓度的变化规律。同时利用FDS程序计算了细水雾作用下烟气温度和组分浓度随时间的变化规律，利用实验数据对计算结果进行了准确性验证。结果表明只要计算网格匹配合理，FDS可以较为准确地预测细水雾作用下烟气温度和组分浓度的变化规律。在实际的细水雾灭火系统工程应用中，可以利用FDS场模拟方法预测灭火过程中火场温度及组分浓度等特性参数的变化规律，这对灭火系统的优化设计具有一定指导意义。
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参考文献
[ 1 ] Grant G, Brenton J, Drysdale D.Fire suppression by water sprays [ A] .Progress in Energy and Combustion Science[ C] .2000 ,26 : 79 -130
[ 2 ] Jones A, Nolan P F.Discussion on the use of fine water sprays or mists for fire suppression[ J] .J of Loss Prev Process Ind, 1995 , 8 ( 1 ) : 17 -22 链接1
[ 3 ] Mawhinney J R, Richardson J K.A state -of -the -art review of water mist fire suppression research and development[ R] .1996. Internal Report No 718
[ 4 ] St -Georges M, Buchlin J M.Detailed single spray experimental measurements and one -dimensional modeling [ J ] .Int J Multi-phase Flow, 1994 , 20 ( 6 ) : 979 -992 链接1
[ 5 ] Lentati A M, Chelliah H K.Dynamics of water droplets in a coun- terflow field and their effect on flame extinction [ J] .Combustion and Flame, 1998 , 115 ( 1 ) :158 -179 链接1
[ 6 ] Alpert R L.Incentive for use of misting sprays as a fire suppres- sion flooding agent [ A] .Water Mist Fire Suppression Workshop Proceedings[ C ] .Gaithersburgh: National Institute of Standards and Technology, 1993.31 -35 链接1
[ 7 ] Mawhinney J R, Eng P.Engineering criteria for water mist fire suppression system [ A] .Water Mist Fire Suppression Workshop [ C] , 1993.37 -73
[ 8 ] Chow W K, Cheung Y L.Simulation of sprinkler -hot layer inter- action using a field model[ J] .Fire and Materials, 1994 , 18 ( 6 ) : 359 -379 链接1
[ 9 ] Kim M B, et al.Burning rate of a pool fire with downward -di- rected sprays[ J] .Fire safety Journal, 1996 ,27 ( 1 ) : 37 -48 链接1
[10] 丛北华,秦俊,廖光煊,等.细水雾作用下固体PMMA燃烧特性的实验研究[J].自然科学进展,2005,15(10):1244-1249 链接1
[11] 周华,朱畅,范明豪,等.高压细水雾灭火系统的雾滴直径测量与灭火试验[J].自然科学进展,2004,14(8):950-954 链接1
[12] Chow W K, Yao B.Numerical modeling for interaction of a water spray with smoke layer [ J] .Numerical Heat Transfer: Part A: Applications, 2001 , 39 ( 3 ) : 267 -283 链接1
[13] Xiang X D, Colbeck I.Charged water drops and smoke dissipa- tion[ J] .Fire Safety Journal, 1997 , 28 ( 3 ) : 227 -232 链接1
[14] Nyankina N, Novozhilov V.Prediction of fire environment under water mist suppression conditions by two -phase zone model[ J] . Journal of Applied Fire Science, 2000—2001 ,10 ( 3 ) : 193 -214
[15] Vaari J.A transient one -zone computer model for total flooding water mist fire suppression in ventilated enclosures [ J ] . Fire Safety Journal, 2002 , 37 ( 2 ) : 229 -257 链接1
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