液化和压缩气体半球形扩散模型集的构建和应用

发布时间：2018-03-15 04:00

本文选题：安全工程　切入点：液化和压缩气体　出处：《安全与环境学报》2017年02期 　论文类型：期刊论文

【摘要】：国内外液化和压缩气体的泄漏爆炸事故屡见不鲜,针对其性质和短时间近地面扩散的特点,总结、修正和扩展了瞬时泄漏下的平均半球形扩散模型。对于连续泄漏,利用数学积分理论建立了静风下的半球形扩散模型。接着对有风时的情况进行建模推导,将风速和气体自身扩散速度进行矢量合成,得到了半椭球形扩散和半椭圆锥与1/4椭球体组合扩散下气体的质量浓度和质量浓度变化趋势。最后用实例验证了该模型的先进性。该模型集能较好地反映液化和压缩气体泄漏后不同泄漏情况、时间、近地面区域和风速下的扩散浓度空间分布及其动态变化过程,为事故后果预估和应急救援决策提供参考。
[Abstract]:The leakage and explosion accidents of liquefied and compressed gases at home and abroad are common. In view of their properties and the characteristics of short time near ground diffusion, the average hemispherical diffusion model under instantaneous leakage is revised and extended. The hemispherical diffusion model under static wind is established by using mathematical integral theory. The variation trend of mass concentration and mass concentration of gas under semi-ellipsoid diffusion and combination diffusion of semi-ellipsoidal cone and 1/4 ellipsoid is obtained. Finally, the advanced nature of the model is verified by an example. The model set can reflect the liquefaction and liquefaction. Different leakage conditions after compressed gas leakage, The spatial distribution of diffusion concentration and its dynamic variation under time, near surface area and wind speed provide reference for accident consequence prediction and emergency rescue decision.
【作者单位】：西南石油大学化学化工学院;泸州华润兴泸燃气有限公司;
【基金】：国家自然科学基金项目(51474187) 四川省安全监管局(四川煤监局)安全生产科技项目(scaqjgjc_stp_20150023)
【分类号】：X928.7

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