王洪德,廖倩雯

• 1:大连交通大学土木与安全工程学院
• 2:大连交通大学环境与化学工程学院

摘要(Abstract)：

为分析和预测天然气泄漏的扩散距离、扩散面积及扩散后的不动火区域,有效控制事故发生及降低事故后果,以某天然气储罐为例,对天然气瞬时泄漏的扩散规律进行了数值仿真。首先,确定适用于轻气的高斯烟团模型;然后,基于高斯烟团模型进行仿真分析,绘制天然气瞬时泄漏扩散的等质量浓度曲线和动火燃爆区域;第三,分析泄漏量、大气稳定度、地表粗糙度等因素对天然气扩散的影响,并分别确定不同条件下的动火燃爆区域;最后,基于数值仿真分析结果,提出天然气泄漏后的应急疏散和救护措施。结果表明:天然气扩散距离和面积随泄漏量增大而增大;大气越稳定,扩散的距离和范围越大;扩散距离随地面粗糙度增大而减小。

关键词(KeyWords)： 安全工程;天然气;瞬时泄漏;高斯烟团模型;扩散规律;扩散距离;仿真分析

Abstract:

Keywords:

基金项目(Foundation): 辽宁省自然科学基金项目(201202022);; 大连市科技项目(2011E15SF118)

作者(Author): 王洪德,廖倩雯

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