Simulation study on thermal radiation model of storage tank fire in chemical industry

doi:10.16265/j.cnki.issn1003-3033.2022.S1.0802

Abstract

Abstract:

In order to find the best fire extinguishing position and make key decision in tank fire rescue, this article analyzed the combustion characteristics of tank fire by the Mudan model, and calculated the thermal radiation range and intensity under different conditions of a large pool fire. A three-dimensional simulation model was established based on the real tank data of a chemical industry park, and the three-dimensional simulation effect of dynamic thermal radiation evolution in the combustion process of pool fire was realized. The results show that, in windy conditions, the flame will shift downwind, and the thermal radiation damage range of the fire will also be affected by the wind. For the upwind area, the thermal radiation damage range of the fire will be reduced. For the downwind area, the thermal radiation damage range of fire is increased due to the influence of wind.

Key words: chemical industry, tank fire, analogue simulation, thermal radiation hazard, pool fire, damage radius

SHI Junhua, ZHU Mei, LI Jin, ZHANG Xuefeng, ZHU Fangyan, WANG Shuai. Simulation study on thermal radiation model of storage tank fire in chemical industry[J]. China Safety Science Journal, 2022, 32(S1): 79-83.

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References 14

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热辐射强度/ (kW·m^-2)	对设备破坏	对人员伤害
37.5	生产设备设施遭受严重损坏	1 min内死亡率100%;10 s内死亡率1%
25.0	无明火时木材长时间暴露而被引燃所需的最小能量;设备设施的钢结构开始变形	1 min内死亡率100%;10 s内严重烧伤
12.5	有明火时木材被点燃所需的最小能量;塑料管及合成材料熔化	1 min内死亡率1%;10 s内1度烧伤
4.0	玻璃暴露30 min后破裂	超过20 s引起疼痛,但不会起水泡

密度/(kg·m^-3)	0.84
定压比热容/(kJ·kg^-1·K^-1)	2.1
燃烧热/(kJ·kg^-1)	4.29×10⁴
汽化潜热/(kJ·kg^-1)	270
常压沸点/K	370

风力等级	37.5 kW/m² (致死)	25 kW/m² (重伤)	12.5 kW/m² (轻伤)
3	12.2	14.5	19.6
6	12.7	19.4	23.3
9	13.1	22.8	26.5

风力等级	37.5 kW/m² (致死)	25 kW/m² (重伤)	12.5 kW/m² (轻伤)
3	11.7	14.1	19.2
6	11.6	13.9	19.0
9	11.4	12.6	16.3

属性名	类型	描述
_MainTex	2D	纹理类型,贴图显示,值为一张辐射等级梯度图片
_Center	Vector	向量类型,池火灾热辐射的坐标信息,值为储罐液池平面的中心坐标
_Radius	Float	浮点类型,池火灾热辐射的危害半径,值通过热辐射理论公式计算