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[1]方益涛,谭海川,唐亮,等.海底掺氢天然气管道的泄漏扩散模拟[J].油气储运,2024,43(09):1-14.
　FANG Yitao,TAN Haichuan,TANG Liang,et al.Research on the Leakage and Diffusion Law of a Certain Submarine Hydrogen-Blended Natural Gas Pipeline[J].Oil & Gas Storage and Transportation,2024,43(09):1-14.

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海底掺氢天然气管道的泄漏扩散模拟

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 43 期数: 2024年09期页码: 1-14 栏目: 出版日期: 2024-09-25

Title:: Research on the Leakage and Diffusion Law of a Certain Submarine Hydrogen-Blended Natural Gas Pipeline

作者:: 方益涛; 谭海川; 唐亮; 王孟杰; 李敬法; 苏越

Author(s):: FANG Yitao; TAN Haichuan; TANG Liang; WANG Mengjie; LI Jingfa; SU Yue

关键词:: 海底管道; 天然气; 掺氢输送; 泄漏; 扩散; 数值模拟

Keywords:: submarine pipeline; natural gas; hydrogen blending transportation; leakage; diffusion; numerical simulation

分类号:: TE832

文献标志码:: A

摘要:: 【目的】泄漏是海底天然气管道最常见的安全事故，当采用海底天然气管道进行掺氢输送时，研究掺氢对海底天然气泄漏扩散演化过程的影响具有重要意义。【方法】采用数值模拟方法，分别对海底掺氢天然气管道的锚断泄漏与小孔泄漏两种典型泄漏场景进行了研究，分析了掺氢比、海水深度、管道埋深、泄漏孔径等关键因素对掺氢天然气泄漏扩散的影响规律。【结果】对于海底掺氢天然气管道不论是锚断泄漏还是小孔泄漏，海水流速均会影响掺氢天然气沿水平及竖直方向的扩散距离。对于海底管道锚断泄漏，掺氢比的增加会增大泄漏掺氢天然气在海水中的扩散速率，相同泄漏时间下掺氢天然气沿水平及竖直方向的扩散距离均会比纯天然气增加；泄漏的掺氢天然气溢出海面的时间与管道埋深正相关，管道在海床上埋设越深，掺氢天然气溢出海面所需的时间越长。对于海底管道小孔泄漏，泄漏的掺氢天然气由于受海床泥沙阻力的影响，扩散过程相对锚断泄漏变缓，掺氢比的增加同样会增大掺氢天然气沿水平及竖直方向的扩散距离；泄漏孔径大小对泄漏扩散具有明显影响，随着泄漏孔径的增大，相同泄漏时间下掺氢天然气的扩散距离变大。【结论】相关研究可为海底掺氢天然气管道的安全输送与泄漏防护提供参考。

Abstract:: [Objective] Leakage is the most common accident in submarine natural gas pipelines. When using submarine natural gas pipelines for hydrogen blending transportation, studying the impact of hydrogen blending on the diffusion and evolution process of submarine natural gas leakage is of great significance. [Methods] In this paper, numerical simulation methods are used to study two typical leakage scenarios, anchor-induced fracture leakage and small-hole leakage, of submarine hydrogen-blended natural gas (HBNG) pipelines. The influence laws of hydrogen blending ratio, seawater depth, pipeline burial depth, and leakage aperture on the diffusion of HBNG leakage are analyzed. [Results] Results indicate that whether it is an anchor-induced fracture leakage or a small-hole leakage of submarine pipelines, the flow rate of seawater will affect the diffusion distance of HBNG along the horizontal and vertical directions. For anchor-induced fracture leakage of submarine pipeline, an increase in hydrogen blending ratio will increase the diffusion rate of the leaked HBNG in seawater. Under the same leakage time, the diffusion distance of leaked HBNG in both horizontal and vertical directions will increase; The time for HBNG to spill over the sea surface is positively correlated with the buried depth of the pipeline. The deeper the pipeline is buried on the seabed, the longer it takes for HBNG to spill over the sea surface. For small-hole leakage of submarine pipelines, the diffusion process of leaked HBNG is relatively slowed down due to the influence of seabed sediment resistance. An increase in hydrogen blending ratio will also increase the diffusion distance of leaked HBNG along the horizontal and vertical directions. The leakage aperture has a significant impact on leakage diffusion. As the leakage aperture increases, the diffusion distance of HBNG increases under the same leakage time. [Conclusion] This study can provide reference for the safe transportation of hydrogen in submarine natural gas pipelines.

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更新日期/Last Update: 2024-05-23