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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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自然通风条件下室内co2扩散浓度变化的数值模拟
DOI: 10.3969/j.issn.1671-7627.2012.03.027, PP. 129-133
Keywords: 自然通风,室内co2,浓度变化,危害区域,重力沉降,分层现象
Abstract:
探究室内危险性气体泄漏后的扩散特性及危害区域的影响,采用cfd软件fluent对室内自然通风条件下co2连续泄漏扩散浓度的变化过程进行了数值模拟,研究co2扩散过程的浓度场分布和危害区域变化规律,并比较co2连续泄漏的风洞实验结果与数值模拟结果。结果表明:co2在重力的作用下,泄漏后向空间的下方扩散,形成气体积聚,浓度逐渐延长,梯度变化较大,出现分层现象,并形成危害区域。随着时间的延长,室内各点的浓度增加,危害区域逐渐变大,并向上方移动;实验数据和模拟结果吻合较好,证明fluent可以较准确地模拟室内co2的扩散过程。
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