基于FLUENT的埋地天然气管道泄漏数值模拟

Numerical Simulation Buried Natural Gas Pipeline Leakage Based on FLUENT

为研究埋地天然气管道泄漏扩散影响因素,建立埋地天然气管道三维模型,采用FLUENT软件模拟研究管道入口压力、泄漏孔尺寸、泄漏孔位置等参数对天然气泄漏量和扩散范围的影响.结果表明:泄漏孔周围温度等值线呈球形分布,泄漏的天然气呈球状扩散;随着管道入口压力及泄漏孔尺寸增大,天然气泄漏量越大,扩散范围也越大;埋地天然气管道向下泄漏时,天然气扩散范围小于向上泄漏和侧面泄漏的情形.

In order to study the influencing factors of leakage diffusion of buried natural gas pipeline,a three-dimensional model of buried natural gas pipeline is established,and FLUENT software is used to simulate and study the influences of different pipeline inlet pressures,leakage hole sizes,leakage hole locations and other parameters on the amount of natural gas leakage and diffusion range.The simulation results show that the temperature contour around the leakage hole is spherical,and the leaked natural gas spreads spherically;with the increase of the pipeline inlet pressure and the size of the leakage hole,the larger the amount of natural gas leakage,and the larger the natural gas spreading range.When the buried natural gas pipeline is leaking downward,the spreading range is smaller than that of the upward leakage and the lateral leakage.