变风速条件下储罐火灾热辐射数值模拟

Numerical simulation of thermal radiation of oil tank area's fires in different wind speed

选取陕北某石油库,根据当地气象条件,利用FDS分别模拟风速条件为0、1.5、4.0、8.0m/s的储罐区火灾事故,从火源热辐射速率、火灾场景、热辐射强度等方面对储罐区火灾特性进行分析。结果表明:随着风速的增大,火源的热释放速率有增大的趋势;风力作用下,火焰形状急剧倾斜,火焰主要发展方向由竖直方向变为下风向;不同风速条件下,热辐射强度的空间分布变化较大。

Taking an oil depot in Shaanxi as the example, accord- ing to the local meteorological conditions, FDS was used to sim- ulate the fire accident in oil tank area under the wind speed of 0, 1.5, 4.0, 8.0 m/s. The fire characteristics of fire in oil tank area were researched from the aspects of heat release rate, fire scenarios and heat radiation intensity, etc. The results showed that the heat release rate of the tank increased with the increas- ing of wind speed. The flame shape inclined because of the wind and the maximum intensity of the heat radiation moved to downward of wind. The distribution of beat radiation intensity was obviously different under different wind speed.