[1]梁文艳,雷鹏,吕伟.不同宽高比下深井立式空间火灾烟气蔓延的数值模拟分析*[J].中国安全生产科学技术,2024,20(7):94-100.[doi:10.11731/j.issn.1673-193x.2024.07.013]
LIANG Wenyan,LEI Peng,LYU Wei.Numerical simulation analysis on smoke spread of fire in deep vertical space with different aspect ratios[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2024,20(7):94-100.[doi:10.11731/j.issn.1673-193x.2024.07.013]
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不同宽高比下深井立式空间火灾烟气蔓延的数值模拟分析*
LIANG Wenyan,LEI Peng,LYU Wei.Numerical simulation analysis on smoke spread of fire in deep vertical space with different aspect ratios[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2024,20(7):94-100.[doi:10.11731/j.issn.1673-193x.2024.07.013]
《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]
- 卷:
- 20
- 期数:
- 2024年7期
- 页码:
- 94-100
- 栏目:
- 职业安全卫生管理与技术
- 出版日期:
- 2024-07-31
文章信息/Info
- Title:
- Numerical simulation analysis on smoke spread of fire in deep vertical space with different aspect ratios
- 文章编号:
- 1673-193X(2024)-07-0094-07
- Keywords:
- deep vertical space fire; aspect ratio; smoke spread; velocity field; numerical simulation
- 分类号:
- X932
- 文献标志码:
- A
- 摘要:
- 为研究宽高比对深井立式空间火灾烟气蔓延的影响，以某深井立体车库为原型，建立7种不同宽高比的深井立式空间物理模型，分析不同宽高比下深井立式空间内的火灾烟气蔓延特性，研究井内烟气速度场和温度的变化规律。研究结果表明：随着宽高比的降低，烟气蔓延至井口的平均速度呈减小趋势，烟气充满深井的时间逐渐缩短；120 s前速度场整体较为规则，烟气竖向流速随着深井宽高比的减小整体呈减小趋势；存在1个临界宽高比，当火源位于深井底部时，井口处刚好只有热烟气的流出，模拟得到的临界宽高比位于0.3~0.36之间；在相同宽高比下，深井中心线上的温度随火源上方高度增加逐渐下降；深井中心线上相同高度处的温度随深井宽高比的减小而上升。研究结果可为深井立式空间的消防设计提供科学参考。
- Abstract:
- To study the influence of aspect ratio on smoke spread of fire in the deep vertical spaces,seven physical models of deep vertical space with different aspect ratios were established based on the prototype of a deep vertical garage.The smoke spread characteristics of fire in the deep vertical space with different aspect ratios were analyzed,and the variation laws of smoke velocity field and temperature in the deep vertical space were mastered.The results show that with the decrease of aspect ratio,the average velocity of smoke spreading to the exit presents a decreasing trend,and the time of smoke filling deep vertical space is shortened gradually.The overall velocity field is relatively regular before 120 seconds,and the vertical velocity of smoke presents a decreasing trend as the aspect ratio of deep vertical space decreases.There is a critical aspect ratio,which means that when the fire source is located at the bottom of deep vertical space,only hot smoke flows out at the exit,and the simulated critical aspect ratio is between 0.3 and 0.36.Under the same simulated critical,the temperature on the center line of deep vertical space decreases gradually with the increase of the height above the fire source.The temperature at the same height along the center line of deep vertical space increases with the decrease of aspect ratio of deep vertical space.The research results can provide scientific reference for fire protection design of deep vertical space.
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相似文献/References:
[1]刘毅,冯子良,彭飞,等.火源深度对深井立式空间火灾烟气流动特性及火灾探测方式的影响分析*[J].中国安全生产科学技术,2024,20(1):86.[doi:10.11731/j.issn.1673-193x.2024.01.013]
LIU Yi,FENG Ziliang,PENG Fei,et al.Analysis of influence of fire source depth on smoke flow characteristics and fire detection methods in deep well vertical space fire[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2024,20(7):86.[doi:10.11731/j.issn.1673-193x.2024.01.013]
备注/Memo
- 备注/Memo:
-
收稿日期： 2023-10-01；网络首发日期： 2024-05-10
* 基金项目： 河南省瓦斯地质与瓦斯治理重点实验室——省部共建国家重点实验室培育基地开放基金项目（WS2022B06）；中央高校基本科研业务费专项资金资助项目（233161001）
作者简介： 梁文艳，硕士研究生，主要研究方向为地下空间火灾烟气流动及控制。
通信作者： 雷鹏，博士，讲师，主要研究方向为地下空间火灾烟气流动及控制、城市公共安全与应急救援。
