Journal of Hebei University(Natural Science Edition) >

2025 , Vol. 45 >Issue 5: 466 - 475

DOI: https://doi.org/10.3969/j.issn.1000-1565.2025.05.003

Experimental study on crack leakage and diffusion behavior of full-scale hydrogen-blended natural gas pipeline

  • HAN Zicong ,
  • DONG Shaohua ,
  • LI Jiamei ,
  • SUN Meng ,
  • CHEN Lin
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  • Key Laboratory of Oil and Gas Safety and Emergency Technology, Ministry of Emergency Management, College of Safety and Ocean Engineering, China University of Petroleum, Beijing 102249, China

Received date: 2025-02-18

  Online published: 2025-09-17

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Abstract

The study on the diffusion characteristics of hydrogen-blended natural gas leakage is of vital significance for ensuring the safety of transportation through pipelines and for the effective promotion of this technology. This research introduced a novel leakage experimental system. The system was used to conduct experimental research on the leakage and diffusion behaviors of hydrogen-blended natural gas. The research shows that crack induced leakage has obvious directionality, whereas the circular hole did not have. Experiments were carried out under three pressure levels. The results showed that increase of the operation pressure led to an increased risk in the near field, while the far field was not affected significant. Boltzmann formula was used to fit the experimental data.The results of fitting showed that the combustible gas cloud in air have higher flammability and explosiveness than the operating medium. This research provides theoretical basis and data support for the safe and reliable operation of hydrogen-blended natural gas systems, and promotes the application of hydrogen energy.

Key words： hydrogen energy; hydrogen-blended natural gas; cracks; leakage and diffusion

Cite this article

HAN Zicong , DONG Shaohua , LI Jiamei , SUN Meng , CHEN Lin . Experimental study on crack leakage and diffusion behavior of full-scale hydrogen-blended natural gas pipeline[J]. Journal of Hebei University(Natural Science Edition), 2025 , 45(5) : 466 -475 . DOI: 10.3969/j.issn.1000-1565.2025.05.003

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