Study on the diffusion characteristics of small hole leakage of high-sulfur natural gas in gathering and transmission pipelines

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2025-04-15 DOI:10.1016/j.icheatmasstransfer.2025.108942

Le Hao , Xiaowei Zhai , Kai Wang

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引用次数: 0

Abstract

The high‑sulfur natural gas contains hydrogen sulfide, which is extremely corrosive and toxic. Its leakage can cause irreversible environmental consequences. This study establishes a high‑sulfur natural gas pipeline leakage model using the three-dimensional CFD numerical calculation method in FLACS. The influences of multiple factors on the extent of leak spread in high‑sulfur natural gas are analyzed. The results show that hydrogen sulfide content in high‑sulfur natural gas inhibits the gas diffusion range. The diffusion distance for 20 % hydrogen sulfide is 0.87 times that of 2 % hydrogen sulfide, and the diffusion height is reduced to 0.83 times due to its higher average molar mass. Pipeline pressure, leakage orifice diameter, and ambient temperature show positive correlations with diffusion distances in all three spatial dimensions. Ambient wind speed increases the horizontal dispersion but inhibits vertical diffusion. The downwind diffusion distance at 5 m/s wind speed is 1.2403 times that at 0.5 m/s, while the diffusion height is reduced to 0.5882 times.

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高硫天然气集输管道小孔泄漏扩散特性研究

高硫天然气含有硫化氢，具有极强的腐蚀性和毒性。它的泄漏会造成不可逆转的环境后果。本研究采用FLACS中三维CFD数值计算方法建立了高硫天然气管道泄漏模型。分析了多种因素对高硫天然气泄漏扩散程度的影响。结果表明，高硫天然气中硫化氢的含量抑制了气体的扩散范围。20%硫化氢的扩散距离是2%硫化氢的0.87倍，由于其平均摩尔质量更高，扩散高度降低到0.83倍。管道压力、泄漏孔直径和环境温度在三个空间维度上均与扩散距离呈正相关。环境风速增加了水平扩散，抑制了垂直扩散。5 m/s风速下的顺风扩散距离是0.5 m/s风速下的1.2403倍，扩散高度降低到0.5882倍。

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来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.