Modeling Consideration in the Simulation of Hydrogen Dispersion within Tunnel Structures
Modeling Consideration in the Simulation of Hydrogen Dispersion within Tunnel Structures
复制标题
隧道结构内氢扩散模拟中的建模考虑
DOI：
10.1155/2012/846517
复制
发表时间：
2012
影响因子：
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通讯作者：
Hisayoshi Tsukikawa and Hiroshi Kanayama,
中科院分区：
文献类型：
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作者：
Idris Ismail;Hisayoshi Tsukikawa and Hiroshi Kanayama,
通过用于不可压缩热对流的免费开源计算流体动力学 (CFD) 代码模拟隧道结构中泄漏氢气的流动。真实隧道五分之一比例的实验模型是要模拟的目标模型。为了实现这一目标，在具有相同氢气入口边界条件的较小隧道结构上研究了不同边界条件（特别是风速）的影响。结果表明了通过隧道的空气速度的阈值/极限值。使用最合适的边界条件计算的目标模型与实验模型显示出一定的一致性。还提出了一种计算代码中使用的浮力系数的方法。
The flow of leaked hydrogen gas in tunnel structures is simulated through a free, open source computational fluid dynamics (CFD) code for incompressible thermal convection flow. A one‐fifth scale experimental model of a real tunnel is the target model to be simulated. To achieve this, studies on the effects of different boundary conditions, in particular, the wind speed, are carried out on smaller tunnel structures with the same hydrogen inlet boundary conditions. The results suggest a threshold/limiting value of air speed through tunnel. The target model computed with the most suitable boundary conditions shows some agreement with the experimental ones. A method to compute the buoyancy factor used in the code is also presented.