| 竖井排烟口对L型高层建筑烟气流动特性影响的模拟研究 |
| |
| 引用本文： | 梁瑞,戴淑灵,文博.竖井排烟口对L型高层建筑烟气流动特性影响的模拟研究[J].中国安全生产科学技术,2022,18(8):135-141. |
| |
| 作者姓名： | 梁瑞 戴淑灵 文博 |
| |
| 作者单位： | （兰州理工大学 石油化工学院，甘肃 兰州 730050） |
| |
| 基金项目： | 作者简介: 梁瑞，硕士，教授，主要研究方向为承压特种设备结构强度、压力容器、压力管道结构完整性评价和特种设备失效和风险分析。 |
| |
| 摘 要： | 为了研究竖井排烟口对L型高层建筑烟气流动特性的影响，建立L型高层建筑火灾的数值模拟模型，以温度、CO浓度和窗口气流速度为指标，探讨在不同排烟面积下高层建筑内部结构的烟气流动特性。研究结果表明:6层为建筑的中性层位置，随着排烟口面积增大，烟气蔓延到竖井顶部的时间缩短，对中性层以下走廊的烟气控制效果增强；火灾发生在中性层以下时，中性层以上窗口气流速度为负，烟气溢出；320 s为温差变化的分界点，在320 s之前，排烟口面积与温差绝对值成正相关，320 s之后则成负相关。
|
| 关 键 词： | 高层建筑 火灾烟气 排烟口 竖井 数值模拟 |
Simulation study on influence of shaft smoke exhaust vent on smoke flow characteristics of L-shaped high-rise buildings |
| |
| LIANG Rui,DAI Shuling,WEN Bo.Simulation study on influence of shaft smoke exhaust vent on smoke flow characteristics of L-shaped high-rise buildings[J].Journal of Safety Science and Technology,2022,18(8):135-141. |
| |
| Authors: | LIANG Rui DAI Shuling WEN Bo |
| |
| Affiliation: | (School of Petrochemical Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China) |
| |
| Abstract: | In order to study the influence of shaft smoke exhaust vent on the smoke flow characteristics of L-shaped high-rise buildings,a numerical simulation model of fire in the L-shaped high-rise buildings was established.Taking the temperature,CO concentration and window airflow velocity as the indicators,the smoke flow characteristics of the internal structure of high-rise building with different smoke exhaust areas were discussed.The results showed that the 6th floor was the neutral floor of the building.As the area of smoke exhaust vent increased,the time for the smoke to spread to the top of shaft was shortened,and the smoke control effect of the corridor below the neutral floor was enhanced.When the fire occurred below the neutral layer,the window airflow velocity above the neutral layer was negative,and the smoke overflowed.320 s was the demarcation point of the temperature difference change.Before 320 s,the area of smoke exhaust vent was proportional to the absolute value of temperature difference,and after 320 s,it was inversely proportional. |
| |
| Keywords: | high-rise building fire smoke smoke exhaust vent shaft numerical simulation |
|
| 点击此处可从《中国安全生产科学技术》浏览原始摘要信息 |
|
点击此处可从《中国安全生产科学技术》下载全文 |
