火灾环境下邻近罐壁热辐射分布实验

油罐火灾蔓延的主要因素是油罐热辐射,在着火罐火焰热辐射作用下,邻近罐极易被引燃,造成整个罐区大面积起火。为了研究邻近罐罐壁热辐射分布规律,建立了油罐燃烧对邻近罐热辐射影响的小尺寸实验装置,开展了火灾环境下邻近罐壁热辐射分布的实验研究。结果表明:在火灾环境下,邻近罐正对着火罐方向的罐壁受辐射作用最大,热辐射从罐顶到罐底逐渐降低、从中心向两边呈轴对称降低;随着L/D(L为相邻两个油罐的距离,D为油罐的直径)增大,邻近罐热辐射下降。实验数据为火灾环境下邻近罐的热辐射研究提供了参考,对防止邻近罐被引燃,做好油罐区火灾爆炸事故的预防具有重大意义。

Experimental study on heat radiation distribution of adjacent tank wall under fire conditions

The main factor of oil tank fire spread should be attributed to the fire’s heat radiation. Affected by the heat radiation transferred from the flame of the firing tank, adjacent tanks are easily ignited and may cause a widespread fire in the entire tank farm. In order to study the distribution rule of heat radiation on tank wall when adjacent tanks are exposed to heat radiation, the small-sized experimental device of the heat radiation influence of burning tank on adjacent tank a smallscale experimental device for the influence of tank combustion on the heat radiation of adjacent tanks was established to conduct the experimental study on heat radiation distribution of adjacent tank wall under fire conditions. The experimental results show that under fire conditions, the adjacent tank wall in front of the firing tank is most exposed to radiation. The heat radiation drops gradually from the tank roof to the tank bottom and symmetrically from the center line to both sides. As the L/D(L is the distance between two adjacent oil tanks, and D is the diameter of the oil tank) ratio increases, the heat radiation on the adjacent tank decreases. The experimental data can provide a reference for the heat radiation research of adjacent tanks under fire conditions, and is of great significance for preventing adjacent tanks from being ignited and preventing fire and explosion accidents in tank farm.