Characteristics of High-Pressure Hydrogen Jet Dispersion Along a Horizontal Plate

Zhonglong He, Qingxin Ba, Jiaxin Zhang, Chenyi Yao, Yujie Wang and Xuefang Li ()
Additional contact information
Zhonglong He: Institute of Thermal Science and Technology (Institute for Advanced Technology), Shandong University, Jinan 250061, China
Qingxin Ba: Institute of Thermal Science and Technology (Institute for Advanced Technology), Shandong University, Jinan 250061, China
Jiaxin Zhang: Institute of Thermal Science and Technology (Institute for Advanced Technology), Shandong University, Jinan 250061, China
Chenyi Yao: Institute of Thermal Science and Technology (Institute for Advanced Technology), Shandong University, Jinan 250061, China
Yujie Wang: Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA
Xuefang Li: Institute of Thermal Science and Technology (Institute for Advanced Technology), Shandong University, Jinan 250061, China

Energies, 2025, vol. 18, issue 9, 1-16

Abstract: Creating and updating safety regulations and standards for industrial processes and end-uses related to hydrogen demand a solid scientific foundation, which requires extensive research on unignited hydrogen releases from high-pressure systems across different situations. This study focuses on high-pressure hydrogen releases along a horizontal plate to investigate the surface effects on hydrogen dispersion. Hydrogen releases from high-pressure sources up to 30 MPa were modeled using a computational fluid dynamics (CFD) method, with the CFD models validated by experimental data. The hydrogen dispersion characteristics along the plate were studied for various source pressures and leak nozzle diameters. The results show that the maximum flammable extent along the plate increases linearly with both the source pressure and nozzle diameter, while the combustible mass increases to the power of 1.5 with the increase in leakage flow rate. The locations where the jet centerline attach to the plate are identical (about 0.41 m away from the nozzle exit in the axial direction) for different source pressures (10~30 MPa) and nozzle diameters (0.5~1.5 mm). The flow region was divided into pre-attachment and attachment zones by the attachment point, and the self-similarity characteristics of both zones were analyzed. Finally, correlations for the centerline and lateral concentration distributions were developed for both the pre- and post-attachment zones. The results can help users quickly assess safety distance when hydrogen leaks along the plate.

Keywords: hydrogen leak; horizontal plate; dispersion characteristics; combustible mass; self-similarity (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/9/2242/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/9/2242/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:18:y:2025:i:9:p:2242-:d:1644529

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().