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首页> 外文期刊>Fire Safety Journal >Vented gaseous deflagrations: Modelling of spring-loaded inertial vent covers
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Vented gaseous deflagrations: Modelling of spring-loaded inertial vent covers

机译：通风的气体爆燃：弹簧加载的惯性通风口盖的建模

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摘要

The model of vented explosion dynamics in an enclosure with inertial vent covers is advanced further by the option of a spring-loaded cover acting as venting device. The model and CINDY code are used to process by the inverse problem method the experiments by Wilson in a 1.7 m~3 vessel with spring-loaded valves with surface densities of up to 245 kg/m~2 at conditions of initially quiescent and turbulent mixtures. It is demonstrated that, similar to translating and hinged vent covers, modelling of the vent cover jet effect is crucial for reasonable prediction of interdependent explosion pressure-time and cover displacement-time transients. The spring constant k was determined through backfitting, and reflects not only the resistance of the cover springs to the internal vessel pressure, but also the cycling frequency of the cover during deflagration. The turbulence factor was found to rise during venting.
机译：带有惯性排气盖的外壳中的排气爆炸动力学模型通过选择弹簧加载的盖作为排气装置而得到了进一步发展。该模型和CINDY代码用于通过反问题方法处理威尔逊在1.7 m〜3装有弹簧阀的容器中进行的实验，该容器在初始静止和湍流混合物条件下的表面密度高达245 kg / m〜2 。结果表明，与平移和铰接式排气盖相似，排气盖射流效应的建模对于合理预测相互依赖的爆炸压力时间和盖位移时间瞬变至关重要。弹簧常数k是通过反向拟合确定的，不仅反映了盖弹簧对容器内部压力的阻力，还反映了爆燃期间盖的循环频率。发现在排气期间湍流因子上升。

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