建筑群外埋地燃气管道泄漏的风险性评估
王鹤超;吴明;杨蕊;程猛猛;张尚洲
【期刊名称】《石油与天然气化工》 【年(卷),期】2015(000)001
【摘要】针对建筑群外埋地燃气管道穿孔泄漏问题，利用Gambit2．4建立三维仿真模型，并运用CFD软件Fluent14．0分别对不同环境温度、湿度条件下，燃气在土壤和大气中的连续泄漏扩散工况进行了数值模拟。对比分析了环境温度、相对湿度耦合作用下对燃气扩散的影响及浓度分布规律。研究结果表明，从泄漏口喷出的燃气首先在土壤层中迅速扩散，致使上方地表附近的浓度值很快达到了爆炸下限和上限。透过地表的燃气遇到两侧建筑物时，在迎风侧和背风侧方向分别形成不同的浓度扩散区域。受不同湿度和温度的影响，部分建筑物表面的预警浓度所处高度发生了明显的变化。案例研究结果可评估燃气泄漏事故的范围大小和指导人员及时有效地疏散。%In view of the problem of buried gas pipeline piercing leakage outside the buildings ,a three‐dimensional
simulation
model
was
established
with
Gambit2 .4 .The continuous leak diffusion circumstance of gas in soil and atmosphere were carried out through numerical modeling by CFD soft‐ware Fluent 14 .0 under different ambient temperature and humidity .The influence factor of gas dif‐fusion and the distribution regularity of concentration were comparatively analyzed under the coupling effect of ambient temperature and relative humidity .The research result showed that the gas ejecting from the leakage mouth
建筑群外埋地燃气管道泄漏的风险性评估
