Flame merging in multiple fires
Flame merging in multiple fires
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DOI：
10.1016/0010-2180(68)90036-9
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发表时间：
1968-08
影响因子：
4.4
通讯作者：
R. Baldwin
中科院分区：
文献类型：
--
作者：
R. Baldwin
考虑了一个简单的多重火灾模型，其中独立的、自由燃烧的火灾形成了一个正方形矩阵。对于单个火焰合并的条件，推导出了一个理论标度律，它与所涉及的火灾数目无关，其中火焰高度、单个燃料层的大小和间距按几何比例缩放。通过这种方法，覆盖范围广泛的规模和配置的数据被关联，并且在数据的限制内，合并开始时的分离与火焰的高度成正比。根据这一比例定律，有人认为，在城市大火中，只有当建筑面积密度非常高，大于约65%时，个别建筑物的火焰才会融合。
A simple model of a multiple fire is considered in which the separate, free burning fires form a square matrix. A theoretical scaling law is deduced for the conditions under which the individual flames will merge, which is independent of the number of fires involved, and in which the height of the flames and the size and separation of the individual fuel beds scale geometrically. By this means data covering a wide range of scales and configurations are correlated, and within the limitations of the data, the separation at the onser of merging is proportional to the height of the flames. On the basis of this scaling law it is suggested that in large fires in cities the flames from individual buildings will only merge when the building area density is very high, greater than about 65 per cent.