| 摘要: |
| 针对城市埋地天然气管道穿孔泄漏扩散问题,结合有限容积法,利用Gambit 2.4建立了天然气管道不同泄漏位置的CFD仿真模型,利用Fluent 6.3分别对天然气管道上部、下部及背风侧3种泄漏工况下,气体在土壤中和空气中的扩散规律进行了数值模拟。研究结果表明,下部泄漏在土壤和空气中的危险范围最大,关闭泄漏管段两端阀门以后,气体扩散危害范围逐渐变小。研究结果为城市埋地天然气管道泄漏事故现场人员疏散及安全抢修提供了理论依据。 |
| 关键词: 天然气管道 泄漏 扩散 数值模拟 |
| DOI：10.3969/j.issn.1007-3426.2014.01.020 |
| 分类号:TE88 |
| 基金项目:国家质检总局科研项目“质检公益性行业科研专项项目”(201010025)。 |
|
| Numerical simulation of urban buried gas pipeline leakage and diffusion |
|
Cheng Mengmeng1, Wu Ming1, Zhao Ling1, Liu Ke2, Shao Dawei2, Yang Mingyue1
|
|
1.College of Petroleum Engineering,Liaoning Shihua University,Fushun 113001, Liaoning,China;2.Shenyang Institute of Special Equipment Inspection & Research, Shenyang 110000, Liaoning,China
|
| Abstract: |
| To study the diffusing of gas piercing leakage in urban buried gas pipeline, combining the finite volume method, CFD simulation models are established by Gambit 2.4 at different leakage locations. The diffusion rule of gas in soil and air are simulated by Fluent 6.3 under the three leakage conditions of the upper, lower and leeward side of the gas pipeline. The research result shows that the lower leakage in soil and air is the largest diffusion hazard area. If the valves at both ends of the pipeline are shut off, the gas diffusion hazard area will gradually get smaller. The studies can also provide the theoretical foundation for the personnel evacuation and security maintenance of pipelines in the scene of natural gas release. |
| Key words: gas pipeline leakage diffusion numerical simulation |
