Study on the Smoke Flow Regulation in Underground Space Based on the CFD Simulation

Abstract

The utilization of the underground space mainly focuses on the following aspects: underground traffic, underground commerce, underground garage, underground amusement spots and urban disaster prevention facilities, for example, the air-raid shelters. Based on the analysis of the characteristics and reasons of the fire in the underground buildings, and with a (or a half) basement of the library in a university as its study object, the FDS of the CFD software is used to carry on a field simulation by setting two fire scenarios and five measuring points. This paper also studies the change process of temperature and visibility in different time and different regions and analyzes the smoke movement regulation with model in this underground space. A conclusion is drawn that, the temperature in each measuring point would rise up quickly in a short time with 131 seconds as its available safe egress time (ASET) of the editorial catalogue room, reaching and even surpassing 60 ̊C, as the safety threshold human can withstand, and that finally tend to a relatively stable point.