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首页> 外文期刊>Journal of Hazardous Materials >Vented gaseous deflagrations: modelling of hinged inertial vent covers
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Vented gaseous deflagrations: modelling of hinged inertial vent covers

机译：通风的气体爆燃：铰链式惯性通风口盖的建模

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摘要

The model of explosion pressure build up in enclosures with inertial vent covers and the CINDY code implementing the model are validated against experiments by Hoechst and Leuckel (1998) in a 50 m~3 vessel with a pair of ceiling-mounted upwards-opening hinged doors in a 'butterfly' configuration with surface densities of 73 and 124 kg/m~2 under conditions of initially quiescent and turbulent mixtures. The model and the code are further validated against an experiment by Zalosh (1978) in a 33.5 m~3 room-like enclosure with a parr of wall-mounted rectangular doors, in a parallel configuration, each hinged at its bottom edge with a surface density of 23.1 kg/m~2 and initially quiescent mixture. A formula for the torque acting upon a rotating venting door is derived under conditions of vent cover jet formation. The vent cover jet effect decreases the torque three times compared to an elementary approach valid at the start of vent cover movement. It is demonstrated that, similar to translating vent covers, the vent cover jet effect is crucial for prediction of interdependent vent cover displacement in time and pressure transients.
机译：Hoechst和Leuckel（1998）在50 m〜3的带有一对吊顶向上打开的铰链门的容器中的实验中，对带有惯性通风口盖的机壳中的爆炸压力模型和实施该模型的CINDY代码进行了验证。在初始静止和湍流混合物的条件下，其表面密度分别为73和124 kg / m〜2的“蝴蝶”状。 Zalosh（1978）在一个33.5 m〜3的房间封闭空间中对模型和代码进行了进一步验证，该空间具有平行安装的一对壁装矩形门，每个门的底部边缘均铰接有一个表面密度为23.1 kg / m〜2，最初为静态混合物。在通风盖射流形成的条件下，得出了作用在旋转的通风门上的扭矩的公式。与在排气盖开始运动时有效的基本方法相比，排气盖喷射效果使扭矩降低了三倍。结果表明，类似于平移通风口盖，通风口盖射流效应对于预测相互依赖的通风口盖在时间和压力瞬变中的位移至关重要。

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