摘要
分析采用空气幕阻挡地铁楼梯口烟气蔓延的可行性和有效性.采用CFD模拟不同空气幕出口速度、出口角度以及来流烟气温度对空气幕挡烟效果的影响.结果表明,设定火灾场景下,空气幕出口速度为4.2 m/s、出口角度为15°～45°时,可以对一定温度范围的烟气进行有效阻挡,但是挡烟失败后,烟气对人员疏散的危险性会增加.另外,烟气温度也会影响空气幕的挡烟效果.
The feasibility and effectiveness of air curtain for smoke spread in stairs in subway was analyzed.Using CFD,the influence of air curtain velocity,angles and smoke temperature on smoke control effect was analyzed.The results indicated that under set fire scenario,air curtain can control smoke with velocity of 4.2 m/s and angle of 15°～45°.However,if the air curtain failed to control smoke,more hazards would be imposed to pedestrians.Moreover,smoke temperature can affect smoke control results of air curtain.
出处
《消防科学与技术》
CAS
北大核心
2016年第7期945-948,共4页
Fire Science and Technology
关键词
烟气控制
地铁火灾
空气幕
挡烟效果
smoke control
subway fire
air curtain
smoke control effectiveness
