Study on natural smoke extraction model in semi-underground tram station fire

doi:10.16265/j.cnki.issn1003-3033.2021.03.022

Abstract

Abstract: In order to verify smoke exhaust effect of natural smoke exhaust mode in semi-underground tram station fire, taking a typical tram station in a city as research object, a full scale model was established by numerical simulation method for calculation, evolution characteristics of temperature distribution in station space, velocity of smoke exhaust outlet and escalator exit in semi-underground tram station under train fire were studied,airflow field, smoke movement process and control effect of natural smoke exhaust mode in semi-underground station fire were analyzed. The results show that for semi-underground tram station, natural smoke exhaust mode can prevent smoke from falling to dangerous height within specified time (6 min),which can be used in the design of same tram station,under natural smoke exhaust mode, air distribution is mainly controlled by thermal buoyancy of fire smoke, which can not maintain stable air distribution and make-up air flow rate at the escalator entrance, which has certain limitations.

Key words: semi-underground tram station, natural smoke exhaust, train fire, smoke exhaust vent, temperature profile

CLC Number:

X928.7

REN Fei, SHI Congling, LI Jian, CHE Honglei, XU Xuan. Study on natural smoke extraction model in semi-underground tram station fire[J]. China Safety Science Journal, 2021, 31(3): 156-161.

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