中国计量大学学报2024，Vol.35Issue(2)：258-265,8.DOI:10.3969/j.issn.2096-2835.2024.02.009
横向火源下隧道火灾温度分布和烟气运动特性研究
Research on temperature distribution and smoke movement characteristics of tunnel fires with a transverse fire source
摘要
Abstract
Aims:This paper aims to study the effect of the flaming vehicle orientation on the temperature distribution and smoke movement characteristics of the tunnel ceiling.Methods:The maximum ceiling temperature rises and smoke back-layering rules of the two typical fire sources under different longitudinal velocity and fire source power were analyzed by numerical simulation combined with the scale model test.Results:Compared to the longitudinal fire source,the horizontal fire source had a stronger smoke blocking effect,with faster smoke movement near the ceiling and greater smoke roll absorption;and the fire source occupied a larger proportion of the tunnel width,with smoke spreading into the first dimension earlier,making the ceiling temperature lower.As the power of the fire source and the longitudinal velocity increased,the difference in ceiling temperature between the two fire sources increased,with a difference of up to 57% in the maximum ceiling temperature under a 30 MW fire source.Compared to the longitudinal fire source,the horizontal fire source tunnel ceiling temperature was lower.The smoke buoyancy was reduced;and the smoke movement was weakened.As the power of the fire source increased and the longitudinal velocity decreased,the difference in back-layering length gradually increased,with a maximum difference of 36 meters under a 30 MW fire source.Conclusions:The stability of the smoke layer of the horizontal fire source is weaker;and the smoke subsiding is more obvious.Even if the low velocity is small,the smoke layer near the fire source section can be destroyed.关键词
安全工程/隧道火灾/横向火源/温度分布/烟气运动Key words
safety engineering/tunnel fire/transverse fire source/temperature distribution/smoke move-ment分类
交通工程引用本文复制引用
黄志,陈茗,夏立群,曹刚,田佳鑫,朱凯..横向火源下隧道火灾温度分布和烟气运动特性研究[J].中国计量大学学报,2024,35(2):258-265,8.基金项目
浙江省重点研发项目(No.2018C03029),宁波市交通运输科技计划项目(No.202113),浙江省大学生科技创新活动计划项目(No.2022R409A016) （No.2018C03029）
