中国铁道科学2017，Vol.38Issue(4)：55-61,7.DOI:10.3969/j.issn.1001-4632.2017.04.08
铁路隧道横通道临界风速研究
Study on Critical Wind Velocity of Cross Passage in Railway Tunnel
摘要
Abstract
The critical wind velocity of cross passage in railway tunnel is an important parameter for the effective smoke prevention in cross passage.The dimensionless analysis of the related factors affecting the critical wind velocity in cross passage was carried out according to π theorem and similarity theorem.The dimensionless function relations were derived between the critical wind velocity and five influence parameters,namely,the longitudinal wind speed in tunnel,heat release rate,the height and width of cross passage fireproof door as well as the angle between cross passage and tunnel.Through numerical simulation and the fitting of simulation data,the relationships between the critical wind velocity of cross passage and the five influence parameters were determined.Results show that,when the dimensionless longitudinal wind velocity of tunnel is less than 0.114,the critical wind velocity of cross passage increases with the increase of the longitudinal wind velocity of tunnel,showing a 3/7 power growth relationship.When the longitudinal wind velocity of tunnel is more than 0.114,the critical wind velocity of cross passage decreases with the increase of the longitudinal wind velocity of tunnel,showing a-3/40 power decrease relationship.The critical wind velocity of cross passage shows 1/3 and 6/5 power growth relationships with the heat release rate of fire source and the height of fireproof door respectively,a-3/8 power decrease relationship with the angle between the cross passage and tunnel,and almost independent of the width of fireproof door.According to these fitting results,the value of each unknown coefficient in the dimensionless function relations is determined,and then the dimensionless formula for the critical wind velocity of cross passage is obtained.关键词
横通道/临界风速/纵向风速/火源释放率/隧道火灾/铁路隧道Key words
Cross passage/Critical wind velocity/Longitudinal wind velocity/Heat release rate of fire source/Tunnel fire/Railway tunnel分类
交通工程引用本文复制引用
姜学鹏,张剑高,何超,王洁..铁路隧道横通道临界风速研究[J].中国铁道科学,2017,38(4):55-61,7.基金项目
湖北省自然科学基金资助项目(2015CFB200) （2015CFB200）
湖北省教育厅科学研究计划重点项目(D20151104,D20161105) （D20151104,D20161105）
公安部消防局科研计划项目(2016XFCX20) （2016XFCX20）
