天然气管道泄漏扩散数值模拟研究

Numerical Simulation Study on Leakage Diffusion of Gas Pipelines

利用Fluent软件模拟研究了天然气管道泄漏后环境中天然气浓度分布特性。结果表明:在1.5m/s和2.1m/s风速时,4%体积浓度等值面内包含的可燃天然气质量最大的时间分别为20s和25s,10%体积浓度等值面内包含的可燃天然气质量最大的时间均为25s。此研究结果可为天然气管道泄漏事故安全评估提供参考。

The Fluent software was used to simulate the distribution characteristics of natural gas concentration in the environment after the leakage of natural gas pipeline.The results show that,at the wind speed of 1.5 m/s and 2.1 m/s,the maximum time of the mass of combustible natural gas contained in the isosurface of 4%volume concentration is 20 s and 25 s,respectively,and the maximum time of the mass of combustible natural gas contained in the isosurface of 10%volume concentration is 25 s.The calculation results can provide reference for the safety evaluation of natural gas pipeline leakage accidents.