Numerical Simulation of Spatial Distribution Characteristics of Hazardous Gas Clouds from Leakage at a Hydrogen-Blended Natural Gas Distribution Station
- 1Chongqing University of Science and Technology , , ,
- 2China Aviation Oil Southwest Storage and Transportation Co., Ltd. , Yanjia Street , Changshou District, ,
Abstract
Blending hydrogen into natural gas pipelines is widely regarded as a promising transitional pathway for large-scale H2 transport; however, it inevitably increases the risk of leaks and explosions at urban distribution stations. This computational fluid dynamics (CFD) study models a typical gas distribution station, employing LFL isosurface area and volume to evaluate the effects of the hydrogen blending ratio (HBR), operating pressure, leakage aperture, wind speed, wind direction, and leak direction on hazardous gas cloud evolution. The results show rapid initial growth in both surface area and volume; the surface area subsequently stabilizes, while the volume continues to rise, indicating continuous hazard zone expansion. A higher HBR broadens the LFL isosurface and promotes a vertical dispersion. Wind speed has a nonlinear influence, while wind direction and leak orientation govern accumulation patterns through the building obstructions. Sensitivity analysis identifies leakage aperture and leak direction as the most influential continuous and categorical factors, respectively, with operating pressure ranking second and HBR and wind speed ranking third. These findings provide support for safety distance determination, leakage aperture monitoring, and emergency response planning for hydrogen-blended gas distribution stations.
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BibTeX
@article{wang2026numerical,
title = {{Numerical Simulation of Spatial Distribution Characteristics of Hazardous Gas Clouds from Leakage at a Hydrogen-Blended Natural Gas Distribution Station}},
author = {Daqing Wang and Zhiwei Jin and Qinfeng Yu and Ping Liang},
journal = {ACS Omega},
year = {2026},
month = oct,
doi = {10.1021/acsomega.6c07516},
url = {https://pubs.acs.org/acsodf/article/11/42/65208/5452460/Numerical-Simulation-of-Spatial-Distribution},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - Numerical Simulation of Spatial Distribution Characteristics of Hazardous Gas Clouds from Leakage at a Hydrogen-Blended Natural Gas Distribution Station
AU - Daqing Wang
AU - Zhiwei Jin
AU - Qinfeng Yu
AU - Ping Liang
PY - 2026
DA - 2026/10/16
JO - ACS Omega
DO - 10.1021/acsomega.6c07516
UR - https://pubs.acs.org/acsodf/article/11/42/65208/5452460/Numerical-Simulation-of-Spatial-Distribution
AB - Blending hydrogen into natural gas pipelines is widely regarded as a promising transitional pathway for large-scale H2 transport; however, it inevitably increases the risk of leaks and explosions at urban distribution stations. This computational fluid dynamics (CFD) study models a typical gas distribution station, employing LFL isosurface area and volume to evaluate the effects of the hydrogen blending ratio (HBR), operating pressure, leakage aperture, wind speed, wind direction, and leak direction on hazardous gas cloud evolution. The results show rapid initial growth in both surface area and volume; the surface area subsequently stabilizes, while the volume continues to rise, indicating continuous hazard zone expansion. A higher HBR broadens the LFL isosurface and promotes a vertical dispersion. Wind speed has a nonlinear influence, while wind direction and leak orientation govern accumulation patterns through the building obstructions. Sensitivity analysis identifies leakage aperture and leak direction as the most influential continuous and categorical factors, respectively, with operating pressure ranking second and HBR and wind speed ranking third. These findings provide support for safety distance determination, leakage aperture monitoring, and emergency response planning for hydrogen-blended gas distribution stations.
SN - 2470-1343
ER -