上悬窗条件下通风控制腔室火灾温度的实验研究

Experimental study on the gas temperature inside fire compartment at under-ventilated condition with a top-hung window

随着建筑结构的发展,上悬窗日益成为城市建筑窗户的选择,但这种通风条件下腔室火灾的发展特性仍缺乏研究。利用1∶8相似比例的缩尺寸腔室火灾实验台,实验研究了上悬窗不同开口尺寸、不同开窗角度下,通风控制的腔室火灾温度发展特性。实验结果表明,通风控制条件下,腔室火灾温度随着上悬窗开口尺寸和开窗角度的增加而增加,并通过能量平衡分析,建立了通风控制条件下,耦合上悬窗尺寸和开窗角度因素的腔室内部火灾温度预测模型。

With the development of building structure,the top-hung window has been a common feature in urban buildings.However,the research on the temperature development inside a fire compartment with a top-hung window for under-ventilated conditions is still lacking.In this paper,experiments are conducted using a 1:8 scale compartment with a top-hung window,and the temperature evolution inside the fire compartment for under-ventilated conditions is measured and analyzed for various window dimensions and opening angles.The results show that the gas temperature inside the fire compartment increases with the increase of the window dimensions and opening angles.A model for the gas temperature inside the fire compartment for under-ventilated conditions is proposed by analyzing the energy balance and considering the effects of the top-hung window dimensions and the opening angles.