利用 CFD 估算建筑物内危险化学品泄漏规模

Kisung Kim, Dongwoo Song
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引用次数: 0

摘要

工业化进程的加快和基础设施的老化导致了二氧化碳等危险化学品的泄漏。泄漏建模对于制定应急响应策略至关重要。因此,我们模拟了一氧化碳泄漏的临界时间(TTC),即达到职业暴露阈值的时间。研究的基础是火灾动力学模拟器,这是一个计算流体动力学模型,用于研究各种情况下 CO 的移动,包括使用不同的建筑布局和面积、温度和泄漏直径。我们进行了多元回归分析,得出了 TTC 与自变量之间的回归方程。最终,我们发现分散类型随二氧化碳密度的温度变化而变化,在自变量中,泄漏直径对 TTC 的影响最大。经过验证,我们发现采用对数转换的回归方程比不采用对数转换的回归方程具有更高的准确性。研究结果为制定危险化学品泄漏情况下有关泄漏规模的应急计划提供了有用信息。不过,还需要对不同的气体类型和泄漏情况进行实证研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Estimation of the Hazardous Chemical Leakage Scale Inside Buildings Using CFD
Increased industrialization and aging infrastructure have resulted in leaks of hazardous chemicals, such as CO. Leak modeling is crucial to developing emergency response strategies. Therefore, we simulated the time to criticality (TTC), which is the time to reach the threshold limit for occupational exposure, of a CO leak. The basis of the study is a fire dynamics simulator, a computational fluid dynamics model that was used to investigate the movement of CO in various scenarios, including using different building layouts and areas, temperatures, and leak diameters. Multiple regression analysis was performed to obtain regression equations for the TTC as a function of the independent variables. Ultimately, we found that the type of dispersion varies with respect to the temperature-dependent density of CO, and, among the independent variables, the leak diameter had the strongest effect on the TTC. The regression equations with logarithmic conversion were validated and found to have higher accuracy than those without logarithmic conversion. The findings provide useful information for developing emergency response plans regarding leak size in the case of hazardous chemical leakage. However, empirical studies of different gas types and leakage scenarios are required.
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