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【英文篇名】 Effect of smoke outlet characteristics on smoke control for highway tunnel with central smoke extraction systems 【作者中文名】 徐琳; 张旭; 【作者英文名】 Xu Lin and Zhang Xu Shandong Jianzhu University; Jinan; China; 【作者单位】 山东建筑大学; 同济大学; 【文献出处】 暖通空调, Heating Ventilating 风口; 诱导风速; 热释放速率; 烟气扩散距离; 【英文关键词】 central smoke extraction; outlet; induced velocity; heat release rate; smoke propagation distance; 【摘要】 结合某集中排烟隧道通风设计,通过CFD模拟,分析了排烟风口形状、风口间距对烟气控制效果的影响。模拟结果表明,集中排烟系统能获得良好的烟气控制效果;排风诱导风速随着火灾热释放速率的增大、排烟口下游烟气扩散范围的缩小而增大;热释放速率、烟气扩散距离一定时,排烟风口形状由正方形变为横向矩形布置、增大风口间距,均可以有效降低诱导风速。在数值模拟的基础上,得到了适合工程应用的量纲一准则关联式,并对隧道集中排烟系统进行了优化设计。 【英文摘要】 With the ventilation design of a highway tunnel, analyses the effect of smoke outlet shape, outlet spacing on smoke control by CFD software. The results show that the central smoke extraction system can achieve desirable control effects, and that the exhaust induced velocity increases with the augment of heat release rate and shrinkage of smoke spreading area downstream of the outlets, and that the transfer of outlet shape from square to rectangular and the enlargement of outlet spacing contribute to the de... 【基金】 上海市科技攻关重大专项课题(编号:04dz12020)