基于Fluent的城镇中低压燃气管线喷射火事故的后果研究
发布时间：2018-08-12 13:01
【摘要】：为了对城镇中低压燃气管线喷射火事故进行有效的风险评估,根据典型事故案例创建了城镇路面埋地燃气管线泄漏场景,建立模型并划分网格,使用Fluent进行模拟计算,得到了不同泄漏口孔径、不同泄漏口形状、不同管内压力等工况下喷射火的火焰长度、火焰中心面温度分布和临近区域内的热流密度,并通过分析不同工况下的火焰形态和热辐射分布,探讨初始条件对事故后果的影响程度。结果表明:此类型喷射火长度可达数十米,火焰最高温度为2 000 K左右,最高温度位置的高度不超过火焰长度的30%;下风向的热流密度较其他方向更强;在50 mm的泄漏口孔径和0.38 MPa的管内压力下,泄漏口为梭子形,较泄漏口为圆形时的热流密度在下风向整体大15.2%。最后,根据模拟结果构建了快速风险评估模型。
[Abstract]:In order to evaluate the risk of the low pressure gas pipeline injection fire accident in cities and towns, according to the typical accident cases, the leakage scene of the buried gas pipeline on the road surface of the town is established, the model is built and the grid is divided, and the simulation calculation is carried out by using Fluent. The flame length, the temperature distribution of the central surface of the flame and the heat flux density in the adjacent region are obtained under different conditions, such as the aperture of the leak, the shape of the leak and the pressure in the tube. By analyzing the flame shape and thermal radiation distribution under different working conditions, the influence of initial conditions on the accident consequences is discussed. The results show that the length of this type of spray fire can reach tens meters, the maximum temperature of the flame is about 2 000 K, the height of the highest temperature position does not exceed 30% of the flame length, and the heat flux in the downwind direction is stronger than that in other directions. Under the pressure of 0.38 MPa and 50 mm, the leakage nozzle is fusiform, and the heat flux density is 15.22in the whole downwind direction compared with the circular one. Finally, a rapid risk assessment model is constructed according to the simulation results.
【作者单位】： 北京理工大学爆炸科学与技术国家重点实验室;
【基金】：国家重点研发计划项目(2016YFC0801204)
【分类号】：TU996;X928.7
本文编号：2179132
[Abstract]:In order to evaluate the risk of the low pressure gas pipeline injection fire accident in cities and towns, according to the typical accident cases, the leakage scene of the buried gas pipeline on the road surface of the town is established, the model is built and the grid is divided, and the simulation calculation is carried out by using Fluent. The flame length, the temperature distribution of the central surface of the flame and the heat flux density in the adjacent region are obtained under different conditions, such as the aperture of the leak, the shape of the leak and the pressure in the tube. By analyzing the flame shape and thermal radiation distribution under different working conditions, the influence of initial conditions on the accident consequences is discussed. The results show that the length of this type of spray fire can reach tens meters, the maximum temperature of the flame is about 2 000 K, the height of the highest temperature position does not exceed 30% of the flame length, and the heat flux in the downwind direction is stronger than that in other directions. Under the pressure of 0.38 MPa and 50 mm, the leakage nozzle is fusiform, and the heat flux density is 15.22in the whole downwind direction compared with the circular one. Finally, a rapid risk assessment model is constructed according to the simulation results.
【作者单位】： 北京理工大学爆炸科学与技术国家重点实验室;
【基金】：国家重点研发计划项目(2016YFC0801204)
【分类号】：TU996;X928.7
【相似文献】
相关期刊论文 前1条
1 李新宏;陈汉;;浅谈低压燃气管线并网施工的安全管理和质量管理[J];企业研究;2014年06期
相关重要报纸文章 前2条
1 王晓刚 杨志君;野蛮施工挖破燃气管线将被行拘[N];中国安全生产报;2014年
2 李金传 本报记者 李宝森;野蛮施工屡禁不止燃气管线频频“受伤”[N];黑龙江日报;2004年
相关硕士学位论文 前1条
1 张鹏;燃气管线工程项目安全管理制度创新研究[D];青岛理工大学;2014年
，本文编号：2179132
本文链接：https://www.wllwen.com/kejilunwen/anquangongcheng/2179132.html
