火灾时期地下停车场通风数值模拟及分析

发布时间：2018-06-25 06:17

本文选题：地下停车场 + 烟气流动　；参考：《辽宁工程技术大学》2014年硕士论文

【摘要】：近年来,我国经济快速发展,人民生活日趋提高,汽车拥有量的快速增长,产生道路拥挤、事故多发、资源消耗、环境污染、自然灾害等多方面的问题。为解决城市发展与用地资源紧张之间的矛盾,建设地下停车场成为解决土地紧张、缓解停车难问题的主要方法之一。然而,与地上建筑相比,地下停车场具有封闭性,且污染物不易扩散,若车库内通风不良,容易引起油蒸汽积聚而产生爆炸引发火灾,因此研究地下车库火灾时期的烟气流动的规律和温度分布情况就显得尤为必要。本文运用CFD软件对地下停车场火灾时期的气流情况进行了模拟分析。分析了不同排烟量和火源位置对地下停车场火灾时期的温度分布和有害气体分布的影响规律,得到地下车库火灾烟气温度分布图和有害气体分布图。模拟结果表明：增大排烟量可以使燃烧产生的高温气体快速扩散,相对降低停车场整体温度,改善车库内的能见度；采取机械排风后明显看到空间下层烟气浓度高于上层；火源点位于空间中心位置时的火灾危害范围最大。
[Abstract]:In recent years, our country's economy has developed rapidly, the people's life is increasing, and the car ownership is increasing rapidly. There are many problems, such as road congestion, accident multiple, resource consumption, environmental pollution, natural disaster and so on. In order to solve the spear between urban development and the shortage of land resources, the construction of underground parking is a solution to land tension and ease of parking. However, compared with the ground building, the underground parking lot is closed, and the pollutants are not easy to spread. If the ventilation in the garage is bad, it is easy to cause the accumulation of oil and steam to produce the fire. Therefore, it is particularly necessary to study the law and temperature distribution of the gas flow during the underground garage fire. In this paper, the CFD software is used to simulate the air flow in the underground parking lot during the fire period. The influence of the different smoke discharge and fire source position on the temperature distribution and the distribution of harmful gas during the fire period in the underground parking lot is analyzed. The gas temperature distribution map and the harmful gas distribution map of the underground garage fire are obtained. The simulation results show that the gas distribution and the distribution of harmful gases are obtained. The increase of exhaust smoke can quickly spread the high temperature gas produced by the combustion, reduce the overall temperature of the parking lot and improve the visibility in the garage. The smoke concentration in the lower layer of the space is obviously higher than that of the upper layer after the mechanical exhaust, and the fire danger range is the largest when the fire source is located in the space center.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU926;TU962

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