风速对成品油库储罐池火灾热辐射分布的影响研究

Influence of wind velocity on heat radiation distribution in tank pool fire of refined oil depot

为了解风速对成品油库大型储罐池火灾事故发生后的池火火焰形态、热辐射分布以及对邻近储罐的影响,利用FLUENT软件,以全液面池火灾为基础,建立了有风工况和无风工况下50 000 m^3汽油储罐的事故模型。模拟发现:按照我国现行规范划定的储罐间间距,在发生单罐池火灾后,其邻近罐在任何风速工况下所接收到的热辐射值均在临界热辐射值13.5 kW/m^2之上;随着风速增大,强辐射区域逐渐由油池上方空间向油池下风方向空间蔓延,引起下风方向储罐二次事故的发生;事故罐邻近储罐,沿罐壁高度方向,热辐射值相差达22.1 kW/m^3,易造成储罐局部损坏。

In order to understand the effects of wind speed on the flame shape, heat radiation distribution and the influence on the adjacent tanks after a fire accident in a large storage tank pool of refined oil tanks, accident models of 50 000 m^3 refined oil tanks under wind condition and windless condition were established based on the pool fire of the full liquid surface using FLUENT software. It is found that, according to tank spacing demarcated by China’s current regulations, the thermal radiation received by the adjacent tank under any wind speed conditions is above the critical thermal radiation value(13.5 kW/m^2) after a single tank fire. As the wind speed increases, the strong radiation area gradually spreads from the space above the oil pool to the downwind space, causing secondary accidents of the storage tank in the downwind direction. Along the height of the adjacent tank wall, the difference in thermal radiation value is up to 22.1 kW/m^3, which may easily cause partial damage to the tank.