Study on temperature distribution ofunderground transfer hall fire smoke

doi:10.16265/j.cnki.issn1003-3033.2018.05.014

Abstract

Abstract: In order to ascertain the height of the smoke vent for an underground transfer hall in an urban comprehensive transportation hub,based on the Froude criterion,a 1∶10 ratio underground transfer hall mechanical exhaust-air-supply experimental platform was built,and experiments were carried out with the platform and the numerical simulation method.Effects of two variables being HRR and smoke extraction rate on the smoke temperature distribution were studied.The effect of the smoke vent height on smoke extraction efficiency was investigated.The results show that for an underground transfer hall fire,HRR is the most important factor affecting the smoke temperature and there is a positive correlation between the temperature of ceiling smoke and the HRR,and the smoke vent height has no apparent effect on the smoke extraction efficiency.For 10 m height transfer hall the smoke vent should be arranged at the 2-3 meters below the ceiling.

Key words: underground transfer hall, mechanical smoke exhaust, heat release rate(HRR), flue-gas, temperature distribution, smoke layer height, height of smoke vent

CLC Number:

X932

HAO Yulu, CHEN Junmin, CHEN Keheng, LI Hang, YANG Ming, LI Xue. Study on temperature distribution ofunderground transfer hall fire smoke[J]. China Safety Science Journal, 2018, 28(5): 80-85.

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