基于FDS的楼梯间直灌式加压送风口布置研究  

Layout of Direct Injection Pressurized Air Supply Vents in Stairwell Based on FDS

作　　者：焦涛[1] 李钰 王凡 JIAO Tao;LI Yu;WANG Fan(Henan Technical College of Construction,Zhengzhou 450064,China;School of Trafficand Transportation Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]河南建筑职业技术学院,河南郑州450064 [2]大连交通大学交通运输工程学院,辽宁大连116028

出　　处：《安全与环境工程》2020年第3期157-162,共6页Safety and Environmental Engineering

基　　金：辽宁省自然科学基金项目(20180550336)。

摘　　要：我国《建筑防排烟系统技术标准》中规定,布置传统加压送风井有困难的楼梯间可采用直灌式加压送风系统,并规定直灌式加压送风口在大于32 m的建筑采用两点式布置,且两点式送风口之间的距离不宜小于建筑高度的1/2,但并未规定具体两点式送风口之间的距离多大可使其防烟效果最优。在满足《技术标准》情况下,利用FDS软件,通过设置不同工况,对楼梯间直灌式加压送风口两点式布置最优方案进行了数值模拟研究,并通过门洞风速来寻找最佳布置方式。结果表明:建筑高度不大于50 m、总层数为12层的情况下,楼梯间直灌式加压送风口位置布置在第2层和次顶层的防烟效果最优。该研究可为楼梯间直灌式加压送风系统优化设计和标准修编提供参考。According to Technical Standard for Smoke Management Systems in Buildings(TSSMSB),direct injection pressurized air supply system can be used in stairwell with difficulties in arranging traditional pressurized air supply shaft.However,TSSMSB only stipulates that the direct injection pressurized air supply vents can be set up as two-point vents in stairwells of the buildings which is greater than 32 m,and the distance of the vents should not be less than 1/2 of the building height,but it does not stipulate the specific distance to achieve the best smoke control effect.with the TSSMSB specification,this paper uses FDS software to set different working conditions,numerically simulates the optimal layout of direct-filled pressu-rized air supply vents in stairwells,and seeks the best layout form through the wind speed of the door opening.The results show that the smoke control effect is the best when the direct injection pressu-rized air supply vents are set up on the second floor and the second top floor if the building is 12 floors with the height of no more than 50 m.The paper may provide a reference for optimization design of the direct injection pressurized air supply system and revision of TSSMSB.

关 键 词：楼梯间 直灌式送风口 两点式布置 FDS软件 

分 类 号：X932[环境科学与工程—安全科学]