论文部分内容阅读
为研究高高原机场特定环境中正庚烷油池火燃烧特性,考虑火灾受空气氧分压等因素影响,在康定高高原机场实验室利用ISO9705燃烧系统开展等效火灾油池的燃烧试验,重点分析热释放速率、燃烧速率、温度场分布和火焰辐射热通量等特性参数的变化规律。结果表明:燃烧速率方面,油池尺寸和单位面积燃烧速率近似呈线性变化;火场温度方面,受大气压力和空气密度影响,油池轴线最高温度较常压低,温升与经典羽流温升理论存在偏差;热辐射通量方面,通过曲线拟合方法得到油池尺寸与热辐射通量的关系式。
In order to study the combustion characteristics of n-heptane oil pool in the high altitude airport environment and to consider the influence of air oxygen partial pressure on the fire conditions, the combustion test of equivalent fire oil pool was carried out in the Kangding Plateau Airport Laboratory using the ISO9705 combustion system. Heat release rate, combustion rate, temperature field distribution and flame radiation heat flux characteristics of the law of variation. The results show that the burning rate of the oil pool changes linearly with the combustion rate. In the field of fire temperature, the maximum temperature of the oil pool axis is lower than the atmospheric pressure due to the influence of the atmospheric pressure and the air density. The temperature rise is similar to that of the classical plume temperature rise Theory exists deviation; heat radiation flux, the curve fitting method to get the relationship between the size and thermal radiation flux.