Abstract: The numerical simulation method of analyzing the effect of barrier on diffusion due to pipeline failure and the model for diffusion of natural gas had been established using species transport and reaction module of Fluent. By practical reconnaissance, the predigested 2D geometric model for barrier was established. Furthermore, the effect of barrier on diffusion of natural gas was obtained by comparison of simulation results (such as the distribution of natural gas and velocities in the case of barrier or no barrier). The simulation results can provide reference for dealing with the leakage of natural gas due to pipeline failure.

Key words: Natural gas   ,   ,  Diffusion   ,   , Pipeline   ,    , Barrier  ,    , Numerical simulation

摘要： 基于Fluent软件的物质传输与反应模块建立了管道天然气泄漏扩散的模型,提出了研究障碍物影响
管道天然气泄漏扩散的数值模拟方法。通过实际勘查,建立了简化的二维几何计算模型。通过模拟分析并对比管
道天然气泄漏扩散区域有、无障碍物时的计算模拟结果(包括天然气在计算区域内的含量、速度等分布),得出了障
碍物对天然气泄漏扩散的影响规律。模拟结果可以为控制天然气泄漏扩散事故提供一定参考。

关键词: 天然气  ,   , 扩散   ,    , 管道   ,   , 障碍物   ,    , 数值模拟