不同通风条件下办公室火灾时温度场研究

Research on temperature field of office in fire under different ventilation conditions

为得到较为真实的火灾时某钢结构办公室的空气温升曲线,利用FDS(Fire Dynamics Simulation)软件进行数值模拟,研究了通风条件的改变对其温度场的影响,最终得到最危险时室内空气的温升曲线.结果表明:通风口可以加速火灾发展,室内热释放速率增大、温度增高.当房间门窗打开时,室内温度达到最大值,为最危险情况,在此情况下模拟得到的空气温升曲线与标准温升曲线ISO834有较大差异.为更加真实反映室内温度分布,将房间进行区域划分,得到了不同区域的温升曲线.

In order to achieve the air temperature of a steel structure office in fires,the computer simulaion was performed by FDS（Fire Dynamics Simulation） program for fire to study the effect of different ventilation conditions to temperature field, in the end the temperature lines was found under the worst condition. Result shows that vents can accelerate the development of fire, increase the indoor heat release rate and the temperature. It is the most dangerous situation that the indoor temperature reaches the maximum when the room doors and windows opening, the air temperature curve with the standard temperature curve ISO834 simulated in this case are quite different. The room was divided into several regions whose temperature curves were achieved to reflect the indoor temperature distribution truly.