内置障碍物诱导下的开敞空间球形气云爆炸冲量的研究

为研究带有结构物的可燃气云爆炸冲量,设计了内置半球条栅形和球袋形两种障碍物的气云爆炸实验,对障碍物特性参数与冲量的关系进行了研究,得到了半球形气云爆炸冲量随障碍物特性参数的近似余弦衰减规律。对实验数据进行综合回归,引入多能模型思想,得到了计算可燃气云爆炸冲量的拟合方程式。

Explosion Impulse of Spherical Vapor Cloud Built-in Barriers

The experiments of vapor cloud explosion were carried out respectively in which the hemispherical strip barrier and the global pouched barrier were set. The pressure-time curve was recorded by system consisted of pressure transducer,A/D card and computer with less than one millisecond. A program was designed to calculate the explosion impulse of observed spot on the basis of pressure-time curve,and the effects of the characteristic parameters of barriers on the explosion impulse were studied. The experimental results show that the explosion impulse increases with interspaced ratio,vapor cloud radius,and barrier radius. The relationship between impulse and distance in the hemispherical vapor cloud is approximate cosine. Moreover,a fitting equation to calculate explosion impulse of hemispherical vapor clouds was proposed by applying multi-energy model.