摘要
随着我国经济的发展以及人均收入的大幅度提高,私家车的数量越来越多,随之而来的是对停车位的需求越来越大。大城市的土地面积有限,为了解决这种问题,地下车库随之出现。地下车库一般密闭性比较高,很难进行通风,一旦发生火灾,污染物会很难排出,人员的逃生和灾后的清理工作也会异常困难。本文使用Fluent 软件对地下车库发生火灾时温度场、流场、CO2 和颗粒物的分布情况进行了数值模拟,并得出了分布规律。模拟结果表明,即使是通风良好的地下车库,在发生火灾时CO2 的浓度依旧很高,车库角落处由于漩涡的产生气流组织较差,CO2的浓度最高,出风口处和车库上部受气流影响,CO2 的浓度较高。颗粒物主要分布在着火点附近以及气流组织差的墙角附近。本文对地下车库内CO2 和颗粒物扩散模拟及分析,对地下车库通风系统的设计具有一定的指导意义。
With the development of China's economy and the substantial increase in per capita income, the number of private cars is increasing, and the demand for parking spaces is increasing. In large cities, the land area is limited, and in order to solve this problem, an underground garage appears. Underground garages generally have high air tightness and are difficult to ventilate. In the event of a fire, pollutants will be difficult to discharge, and personnel escape and post-disaster cleanup work will be extremely difficult. In this paper, the Fluent software is used to simulate the temperature field, flow field CO2 and particulates distribution in the underground garage, and the distribution law is obtained. The simulation results show that even in a well-ventilated underground garage, the concentration in the event of a fire is still very high. The airflow in the corner of the garage is poor due to the vortex, the concentration of CO2 is very high, and the air outlet and the upper part of the garage are affected by the airflow. The concentration of CO2 is higher. Particulate matter is mainly distributed near the fire point and near the corner of the wall where the gas flow is poor. This paper has a certain guiding significance for the simulation and analysis of the underground garage ventilation system.
出处
《洁净与空调技术》
2019年第2期26-30,共5页
Contamination Control & Air-Conditioning Technology
关键词
地下车库
CO2
数值模拟
气流组织火灾
Underground garage
CO2
Numerical simulation
Airflow organization
