Modeling and Experimental Study on Merging Flame from Multi-Fire Sources

火焰尖端高度在平行配置中显示混合或包含的形式，从两个矩形火焰源中显示，从三个和四个循环池在对称配置中是研究的实验和理论上。两种类型的燃料、螺旋和六文，都是为了那些火而有效的。无尺寸形式的火焰尖端高度， L/L_m（L和L_m在火焰尖端高度和合并/包括火焰尖端高度没有分离，尊重地），成功地由火焰来源的一个功能描述为无尺寸的耳释放率和无尺寸的距离，as in the form of L/L_m = （Q^\*_m·f_s） ^<2/5> for square or circular pool fires and L/L_m = （Q^\**_m· f_1） ^<2/3> for rectangular or line fire sources。Q^\*\_m is defined as Q^\*\_m = Q/p ·C_p·T_o· ROO<gD>· D^2 for square/circular po ol fires， and Q^\*\_m = Q/p ·C_p·T_o· ROO<gD>· DW for rectangular/fires without separation between fire sources。f_s和f_1是从特定燃烧区到火灾区的校正因素，定义为f_s = （S^2+n· D^2）/n ·（S ^2+D^2）用于方形/环形火灾源，f_1 = （WD+ S^2）/2·（DW+S^2）用于线路/环形火灾源，尊重。其中n是池燃烧源的数目， D宽度是矩形燃烧器的短长度或池燃烧源的字符长度， W宽度是矩形燃烧器的长长度，以及火源之间的S分离。同样的更正被发现在火焰扩展行为上，当一个矩形或圆形火焰来源采取方法到墙壁时，如果我们认为一个想象中的火焰来源的相同大小，并在同一热量释放在墙壁中。

Flame tip height which were showing merged form or inclined form from two rectangular fire sources in a parallel configuration, and from three and four circular pools in a symmetrical cofiguration were studied experimentally and theoretically. Two kinds of fuel, propane and hexane, were utilized for those fires respectively. Flame tip height in dimensionless form, L/L_m (where L and L_m are flame tip height and merged / inclined flame tip height without separation, respectively), was expressed successfully by a function of dimensionless hear release rate and dimensionless speparation distance between the fire sources, as in the form of L/L_m = (Q^<**>_m・f_s) ^<2/5> for square or circular pool fires and L/L_m = (Q^<**>_m・ f_1) ^<2/3> for rectangular or line fire sources. Q^<**>_m is defined as Q^<**>_m= Q/p ・ C_p・ T_o・ ROO<gD>・ D^2 for square/circular po ol fires, and Q^<**>_m= Q/p ・ C_p・ T_o・ ROO<gD>・ DW for rectangular/fine fires without separation between fire sources. And f_s and f_1 are the correction factors of apparent burning area to fire area and are defined as f_s = (S^2+n・ D^2)/n ・(S^2+D^2) for square/circular fire sources and as f_1 = (WD+S^2)/2・(DW+S^2) for line/rectangular fire sources, respectively. Where n is number of pool fire sources, D width of shorter length of rectangular burner or characteristic length of pool fire source, W width of longer length of rectangular burner, S separation between fire sources. The same correction was obtained on flame extension behavior when a rectangular or a circular fire sources approaches to the wall if we consider an imaginary fire source of the same size and in the same heat release inside a wall.