摘要
以5 000m~3立式拱顶储罐为研究对象,建立了储罐内外流场三维有限元模型,在考虑储罐壁面传热的前提下,采用组分概率密度运输燃烧模型对储罐内爆过程进行数值模拟分析,计算不同工况内爆载荷作用下的辐射半径。结果表明:空罐中心起爆时,爆炸压力波辐射距离为55m,相比靠近罐壁一侧起爆时的辐射距离减少10%;爆炸压力波辐射距离随液位的升高逐渐缩短,满灌、半罐液位相比空罐爆炸压力波辐射距离依次缩短37%、17%;在空罐中心起爆时,正向爆炸压力波传播距离相比侧向辐射的更远、更危险,辐射传播距离增加20%。
Taking 5 000 m~3 vertical vault tank as the object of study, a three-dimensional finite element model for the tank's internal and external flow fields was established. On the premise of considering heat transmission on the tank surface, the component propability density transport combustion model was used to simulate and analyze explosion process inside the tank and to calculate radiation radius under different conditions of explosion load. The results show that the radiation distance of the explosion pressure wave is 55 m at the center of empty tank, which is 10% less than that at the side near the tank wall; the radiation distance of the pressure wave shortens gradually with the increase of liquid level, which is 37% and 17% shorter at full and half tank level than that at the center of empty tank. Center explosion radiation distance is farther and more dangerous than that of the side explosion and the distance of radiation transmission increases by 20%.
引文
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