Study on Dynamic Leakage of Gas Pipeline

doi:10.3969/j.issn.1672-6952.2017.01.006

Journal of Liaoning Petrochemical University ›› 2017, Vol. 37 ›› Issue (1): 30-33.DOI: 10.3969/j.issn.1672-6952.2017.01.006

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Study on Dynamic Leakage of Gas Pipeline

Received:2016-04-18 Revised:2017-05-20 Published:2017-02-24 Online:2017-03-16

燃气管道的动态泄漏研究

孙禹楠,王岳

辽宁石油化工大学石油天然气工程学院,辽宁抚顺113001

通讯作者: 王岳(1962-),男,硕士,教授,从事油气储运工程及相关技术方面的研究;E-mail:wangyuefs@126.com。
作者简介:孙禹楠(1990-),男,硕士研究生,从事油气管道安全方面的研究;E-mail:353377765@qq.com。

Abstract

Abstract:

The leakage of city gas pipeline was a complicated dynamic leakage after the valve was closed. The gas flow state and gas parameters of the leakage process could change over time. Using the model of pipeline leakage and diffusion, the changes of this process in the place of leak flow and the important parameters of center point pressure leakage were obtained. The important parameters of the leakage process were analyzed by using Origin mathematical analysis software. The results showed that the duration of the subcritical flow stage was 2 times of the critical current duration. The pressure drop rate of the critical flow and subcritical flow two stage were different. The greater was the pressure tubes, decreasing rate of critical flow stage and the greater was subcritical flow stage leakage flow. Although the critical flow stage was shorter, the leakage rate was higher, and the risk of the leakage was relatively higher. The final results could provide reference data for city gas pipeline leakage accident prevention and emergency rescue.

Key words: Gaspipe line, Dynamic leakage, Flow, Pressure

摘要： 城市燃气管道在分段阀门关闭之后的泄漏是一个复杂的动态泄漏过程,在泄漏过程中燃气的流动状态和燃气的参数均随时间发生变化。结合管道泄漏扩散模型,计算了泄漏口处的流量、泄漏中心点压力等参数,并利用Origin数学分析软件分析了参数随时间的变化情况。研究结果表明,亚临界流泄漏阶段所持续的时间是临界流泄漏阶段持续时间的2倍以上,临界流和亚临界流两个阶段的压力下降速率相差较大;管内压力越大,临界流泄漏阶段和亚临界流泄漏阶段泄漏口流量下降速率相差越大;虽然临界流泄漏阶段泄漏时间较短,但在此阶段泄漏率较高,存在较大的危害性;通过拟合得出了泄漏口处的流量、泄漏点中心压力随时间的变化规律。研究结果可为城市燃气管道泄漏事故的预防及应急救援提供数据参考。

关键词: 燃气管道, 动态泄漏, 流量, 压力

SunYunan, WangYue. Study on Dynamic Leakage of Gas Pipeline[J]. Journal of Liaoning Petrochemical University, 2017, 37(1): 30-33.

孙禹楠, 王岳. 燃气管道的动态泄漏研究[J]. 辽宁石油化工大学学报, 2017, 37(1): 30-33.

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Study on Dynamic Leakage of Gas Pipeline

燃气管道的动态泄漏研究

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