集中排烟公路隧道临界排烟速率计算模型

doi:10.16265/j.cnki.issn1003-3033.2017.10.009

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (10): 50-55.doi: 10.16265/j.cnki.issn1003-3033.2017.10.009

集中排烟公路隧道临界排烟速率计算模型

姜学鹏^1,2 副教授, 陈姝^1,2, 郭昆^1,2

1 武汉科技大学资源与环境工程学院,湖北武汉 430081;
2 武汉科技大学消防安全技术研究所,湖北武汉 430081

收稿日期:2017-08-10 修回日期:2017-09-16 出版日期:2017-10-20 发布日期:2020-11-05
作者简介:姜学鹏 (1976—),男,山东青岛人,博士,副教授,主要从事隧道及地下工程安全与防灾等方面的研究。E-mail: jxp5276@126.com。
基金资助:
湖北省自然科学基金资助 (2015CFB200);公安部消防局科研计划(2016XFCX20); 湖北省教育厅科学研究计划重点项目(D20151104,D20161105)。

Model for prediction of critical smoke extraction rate from road tunnel with central exhaust system

JIANG Xuepeng^1,2, CHEN Shu^1,2, GUO Kun^1,2

1 School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan Hubei 430081, China;
2 Fire Safety Technology Institute, Wuhan University of Science and Technology, Wuhan Hubei 430081, China

Received:2017-08-10 Revised:2017-09-16 Online:2017-10-20 Published:2020-11-05

摘要/Abstract

摘要： 为合理设计公路隧道排烟系统的排烟量,采用1∶20缩尺寸模型试验的方法,研究临界排烟速率对公路隧道集中排烟系统排烟效率的影响。首先,通过测量火源功率的6个数值、不同机械排烟量条件下排烟口下方烟气层温度、厚度,得到不同火源功率下发生吸穿时的临界排烟速率试验值;然后,将试验值与Heselden模型、TM 19-1995模型计算值进行对比,分析2种排烟模式下的临界排烟速率计算模型的差异性;最后,在TM 19-1995模型的基础上,引入火源功率修正系数,得到修正后随火源功率变化的集中排烟隧道临界排烟速率计算模型。结果表明:集中排烟公路隧道内发生吸穿时的临界排烟速率明显大于Heselden模型、TM 19-1995模型的计算值,且临界排烟速率值与火源功率线性相关。

关键词: 公路隧道, 缩尺寸试验, 集中排烟系统, 吸穿, 临界排烟速率计算模型

Abstract: To design a reasonable smoke exhaust volume for the road tunnels with a central exhaust system , the influence of the critical smoke exhaust rate on the efficiency of the central exhaust system was studied with a 1∶20 scale tunnel model. By measuring the smoke layer temperature, thickness at 6 heat release rates and different mechanical smoke exhaust volumes, and these critical smoke extraction rate test values, corresponding to the plugholing phenomena, were obtained under different heat release rates. A comparison was made between the values of model test and the calculated values. The differences between three kinds of critical smoke exhaust rate calculation models were analyzed. By introducing a correction coefficient of heat release rate to the TM 19-1995 model, an exponential expression was obtained for corrected critical smoke extraction rate as a function of the heat release rate. The results show that the critical smoke extraction rates calculated by both the Heselden model and the TM 19-1995 model, are smaller than the measured rates, and there is a linear correlation relation between the critical smote extraction rate and the heat release rate.

Key words: road tunnel, small scale model, central exhaust system, plugholing, critical smoke extraction rate calculation model

中图分类号:

X928.7

姜学鹏, 陈姝, 郭昆. 集中排烟公路隧道临界排烟速率计算模型[J]. 中国安全科学学报, 2017, 27(10): 50-55.

JIANG Xuepeng, CHEN Shu, GUO Kun. Model for prediction of critical smoke extraction rate from road tunnel with central exhaust system[J]. China Safety Science Journal, 2017, 27(10): 50-55.

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集中排烟公路隧道临界排烟速率计算模型

Model for prediction of critical smoke extraction rate from road tunnel with central exhaust system

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