平行双电缆火蔓延特性及预测模型研究

电缆广泛应用于城市建筑和工业场所,一旦电缆被点燃将会造成严重的后果.而电缆在敷设时并非单根,故本文以水平方向上的平行双电缆为研究对象,通过对其燃烧过程中的3种传热方式进行分析,建立预测火蔓延速度的数学模型.开展水平方向上的平行双电缆火蔓延实验研究,分析电缆间距对火蔓延特性的影响,发现火焰高度、火焰宽度、火蔓延速度随间距...

Study on fire spread model characteristics and forcasting of parallel double cables

Cables are widely used in urban buildings and industrial sites. Once the cable is ignited, it will cause serious consequences. The cable is not only one when laying, so this paper takes the parallel double cables in the horizontal direction as the research object. By analyzing the three thermal transfer modes in the combustion process, a mathematical model for predicting the flame spread rate is established. An experimental study on the flame spread of parallel double cables in the horizontal direction is carried out and the influence of cable spacing on flame spread characteristics are analyzed. The flame width and the flame height increased first and then decreased with the increasing of the cable distance, the flame spread rate also increased first and then decreased with the increasing of the cable spacing. The experimental results are in good agreement with the model prediction results.