基于正交分析的防烟缓冲区参数设置研究

发布时间：2018-07-05 18:29

本文选题：高层建筑 + 烟气控制　；参考：《工业安全与环保》2016年12期

【摘要】：为了研究典型长廊型高层建筑中走廊-前室缓冲区不同参数设置对烟气控制的影响,利用FDS软件建立长廊型高建筑火灾烟气运动模型。利用空气幕配合正压送风在前室门前形成防烟缓冲区,运用正交设计的方法分析流量比、空气幕射流速度以及空气幕射流角度对缓冲区防烟能力的影响,得出防烟缓冲区最佳模式为空气幕送风量与前室加压送风量之比为2∶1,空气幕射流速度为8 m/s,空气幕射流角度为30°。与传统正压送风防烟模式相比,防烟缓冲区最佳模式下,前室的平均CO浓度降低了99.99%,平均温度降低了98.47%,防烟缓冲最佳模式使前室加压送风量减少了1/3,楼梯间加压风量减少22.56%,节约了送竖井的地面积,减少了进入走廊和火场区的送风量,使排烟效率提高了8.76%。
[Abstract]:In order to study the influence of different parameters on smoke control in typical corridor high-rise building, the smoke movement model of corridor high building fire was established by FDS software. The smoke control buffer zone is formed in front of the front chamber by air curtain combined with positive pressure air supply. The effects of flow ratio, air curtain jet velocity and air curtain jet angle on the smoke prevention ability of the buffer zone are analyzed by orthogonal design method. It is concluded that the best model of smoke control buffer is that the ratio of air curtain air supply to air pressure air supply is 2: 1, the velocity of air curtain jet is 8 m / s, and the angle of air curtain jet is 30 掳. Compared with the traditional positive pressure air smoke prevention mode, the best smoke control buffer mode, The average CO concentration in the front chamber was reduced by 99.99%, the average temperature was reduced by 98.47%, the best mode of smoke prevention and buffer reduced the volume of pressurized air supply in the front chamber by 1 / 3, the pressurized air volume in the stairwell decreased by 22.56%, the floor area of the shaft was saved, and the air supply volume into the corridor and fire site was reduced. The efficiency of exhaust smoke was increased by 8.76.
【作者单位】：南京工业大学城市建设学院;江苏省城市与工业安全重点实验室;南京工业大学安全工程学院;
【基金】：国家自然科学基金(51478219)
【分类号】：TU972.4

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