中庭火灾烟气流动数值模拟NUMERICAL SIMULATION OF SMOKE MOVEMENT IN ATRIUM FIRES
刘方,付祥钊,郑洁,廖曙江
摘要(Abstract)：
根据中庭火灾特点 ,提出了考虑辐射换热损失和壁面传热损失、不考虑燃烧过程、视火焰为体积热源 ,浮升力作用下火灾烟气湍流流动的场模型。并将辐射换热损失计入壁面传热损失 ,简化辐射换热模型计算。运用该场模型对中庭模型实验装置火灾烟气流动进行了数值模拟。采用通用软件 PHOENICS进行数值计算。研究表明 ,数值模拟结果与中庭模型实验装置火灾试验结果吻合 ;以热源模拟火焰的方法对分析中庭火灾烟流发展规律可行
关键词(KeyWords)： 建筑火灾;烟气流动;数值模拟;中庭
基金项目(Foundation): 国家科技进步重点项目“现代城市防灾减灾系统工程”——子项目“高层建筑中庭综合防火技术研究”(编号 :98- 0 4 - 0 3)
作者(Author): 刘方,付祥钊,郑洁,廖曙江
参考文献(References)：
- 1 FanWeicheng,WangQing'an andJiangXi.Rise and development of fire safety science[J].FireSafetyScience(inChinese),1992:194～200
- 2 YuanL iming andFanWeicheng.Theoretical analysis of hot smokelayer development in large space building fires[J].Journal ofNatu-ralDisasters(inChinese),1998,7(1):21～26
- 3 ChowW K.Smoke movement and design of smoke control in atri-um[J].HousingScience,1989,13(4):307～322
- 4 YangChunxin,YuanXiuping andXuXiangdong.Numerical simu-lation method of fire and its application[J].ChinaSafetyScienceJournal(inChinese),1994,1(4):11～22
- 5 FanWeicheng andWangQingan.Introduction toFireSafetySci-ence[M ].Wuhan:HubeiScience andTechnologyPress(inChinese),1993
- 6 RaycraftJ andMelleher.Fire spread in a three- dimensional pres-sure vessel with radiation exchange and wall heat losses[J].MathComputeModeling,1990,14:795～800
- 7 L iangDong.GasMovement inMineVentilationEngineering anditsNumericalSimulation[M].Beijing:CoalIndustryPress(inChinese),1999