燃气管道泄漏扩散研究进展

Progress of research on leakage diffusion of gas pipelines

中国燃气管道逐渐进入事故多发阶段,燃气泄漏会增加管道运行的安全风险,严重事故甚至会导致人员伤亡。通过调研燃气管道泄漏扩散的相关研究,分别从泄漏扩散模型、数值模拟、实验研究、土壤-大气耦合4个方面论述了燃气管道泄漏扩散的国内外研究进展。探讨并指出了当前燃气管道泄漏扩散研究存在的问题:已有研究多集中于相对简单的管廊及架空管道燃气的泄漏,关于埋地管道泄漏的研究相对较少;对于泄漏影响因素的考虑尚不够全面,尤其在高压管道泄漏、多点泄漏叠加影响、泄漏溯源等方面成果极少;在埋地燃气管道泄漏规律的研究中,对土壤的性质大多只做了简化处理;数值模拟与实验结合对比的研究较少,模拟结果的准确性有待验证。研究成果可为中国即将到来的燃气管道泄漏高发期提前做好理论与实践准备。(参49)

Gas pipelines in China have gradually entered the stage of frequent accidents, and gas leakage will increase the safety risk of pipeline operation, even resulting in personnel casualties. By investigating and survey, the progress of researches on the leakage and diffusion of gas pipeline was demonstrated in terms of leakage and diffusion model, numerical simulation,experimental research and soil-atmosphere coupling. Additionally, the current problems of research on leakage and diffusion of gas pipelines were discussed and pointed out. Definitely, most of the present researches focus on the gas leakage of the simple pipe galleries and the overhead pipelines, but little research is on the leakage of buried pipelines. The factors affecting the leakage are not fully considered, with few results on high-pressure pipeline leakage, multi-point leakage superposition influence and leakage sourcing obtained. Most of the soil properties are treated simply in the study of the leakage law of buried pipelines. Moreover, there are few studies on the comparison between numerical simulation and experiment, and the accuracy of simulation results remains to be verified. Conclusively, the research results could make a good preparation for the coming high incidence period of gas pipeline leakage in China in theory and practice.(49 References)