基于FLUENT的含硫天然气泄漏数值模拟研究  

Numerical simulation for the leakage of natural gas with sulfur based on FLUENT software

作　　者：王亚超[1,2] 罗振敏[1,2] 肖旸[1,2] 程方明[1,2] 

机构地区：[1]西安科技大学安全科学与工程学院,陕西西安710054 [2]教育部西部矿井开采及灾害防治重点实验室,陕西西安710054

出　　处：《西安科技大学学报》2016年第4期484-489,共6页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金(51304155);国家自然科学基金(51404192);国家自然科学基金(51504187);博士启动基金(A5030144)

摘　　要：为了研究天然气输送管道发生泄漏后气体的扩散规律,以长庆油田第五采气厂输送管道为研究对象,利用FLUENT软件进行数值计算。根据现场的实际情况,建立了数值模拟的物理模型,设置合理的边界条件,得到了不同风速下天然气扩散规律。结果表明:在静风条件下,气体的浓度和速度分布基本上呈对称分布。在风力的作用下,气体的浓度场向下风向发生了明显的偏斜,当风速为3 m/s时,喷射气流大约在泄漏口上方50 m处发生偏斜,当风速为5 m/s时,喷射气流大约在泄漏口上方35 m处发生偏斜,当风速为10 m/s时,喷射气流大约在泄漏口上方15 m处发生偏斜,而且随着风速的增大,射流偏离竖直方向角度也增大。同时风速越大,硫化氢对人体有危害的面积越小。The transportation pipe of 5th Gas Recovery Plant with Petro China Changqing（ PCOC ）was simulated using FLUENT software to study the diffusion characteristics of natural gas in the pipe after leakage. The physical model was built according to the field investigation, and the diffusion characteris- tics at various air velocities were obtained at appropriate boundary conditions. The results indicate that the distributions of gas concentrations and velocities were both symmetric at windless conditions. The gas concentration field declines downstream due to the wind. At air velocities of 3,5 and 10 m/s, the decline of the jet gas started at 50,35 and 15 m above the 1 increase of the air velocity, the decline slope became gen sulfide was smaller. eakage opening, respectively. Additionally, with the larger, and the harmful area to humans from hydro-

关 键 词：数值模拟 天然气泄漏 风速 危险区域 

分 类 号：X937[环境科学与工程—安全科学]