A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Experimental study on the temperature profiles in a naturally ventilated metro tunnel with a transverse cross-passage
Highlights Smoke bifurcation was observed and discussed. Influence of longitudinal fire location on ceiling temperature variation was addressed in priority. Two modified models were carried out.
Abstract This paper experimentally studied the maximum temperature and ceiling temperature decays in a naturally ventilated tunnel designed with a transverse cross-passage. Influence of longitudinal fire location on the thermal temperature distribution was predominately investigated. A series of experimental tests were conducted in a 1/15 model tunnel with pool fires loaded into five different fuel pans. Meanwhile, smoke bifurcation and its thermal spreading inside tunnel was also observed and analyzed. Results indicated that values of the maximum temperature of the fire located at bifurcated point were relatively higher than the values of pool fires located at other locations. Meanwhile, ceiling temperature attenuation in the main tunnel was found to be insignificantly affected by the longitudinal fire location while temperature decays in the cross-passage was greatly affected. Based on experimental results, empirical models were proposed to calculate the maximum temperature in the main tunnel and to predict temperature decays in the cross-passage. Comparison among experimental data, predicted values, and literature values performed good agreement.
Experimental study on the temperature profiles in a naturally ventilated metro tunnel with a transverse cross-passage
Highlights Smoke bifurcation was observed and discussed. Influence of longitudinal fire location on ceiling temperature variation was addressed in priority. Two modified models were carried out.
Abstract This paper experimentally studied the maximum temperature and ceiling temperature decays in a naturally ventilated tunnel designed with a transverse cross-passage. Influence of longitudinal fire location on the thermal temperature distribution was predominately investigated. A series of experimental tests were conducted in a 1/15 model tunnel with pool fires loaded into five different fuel pans. Meanwhile, smoke bifurcation and its thermal spreading inside tunnel was also observed and analyzed. Results indicated that values of the maximum temperature of the fire located at bifurcated point were relatively higher than the values of pool fires located at other locations. Meanwhile, ceiling temperature attenuation in the main tunnel was found to be insignificantly affected by the longitudinal fire location while temperature decays in the cross-passage was greatly affected. Based on experimental results, empirical models were proposed to calculate the maximum temperature in the main tunnel and to predict temperature decays in the cross-passage. Comparison among experimental data, predicted values, and literature values performed good agreement.
Experimental study on the temperature profiles in a naturally ventilated metro tunnel with a transverse cross-passage
Liu, Fang (author) / Han, Jiaqiang (author) / Wang, Fei (author) / Wang, Zihao (author) / Weng, Miaocheng (author)
2021-07-06
Article (Journal)
Electronic Resource
English
Numerical study of a naturally cross-ventilated building
| Elsevier | 2009
Numerical study of a naturally cross-ventilated building
| Online Contents | 2010