TY - JOUR
T1 - Study on the pressure characteristics and flame dynamics behavior of methane-hydrogen gas mixtures under the influence of multiple factors
AU - Li, Ranran
AU - Xiu, Zihao
AU - Li, Shuhong
AU - Liu, Zhenyi
AU - Li, Mingzhi
AU - Liu, Qiqi
N1 - Publisher Copyright:
© 2025 Hydrogen Energy Publications LLC
PY - 2025/6/6
Y1 - 2025/6/6
N2 - In the context of the “dual-carbon” initiative, incorporating hydrogen into natural gas has emerged as a promising strategy for hydrogen energy utilization, drawing increasing attention from various industries. However, the associated risks of combustion and explosion warrant thorough investigation. This study systematically examines the pressure dynamics and flame behavior of methane–hydrogen mixtures in confined spaces under varying conditions. The results reveal a non-monotonic decay in outdoor overpressure during vented explosions. At high hydrogen doping ratios (80 %–100 %), the growth in peak overpressure diminishes, and the average flame propagation speed stabilizes. An increase in the venting coefficient reduces peak overpressure, delays explosion development, and decreases flame speed, with a critical range identified between 0.15 and 0.18 for 20 % hydrogen doping. Furthermore, within a side ratio range of 0.5–2.0 and under constant enclosure volume and height, the explosion overpressure peaks at a side ratio of 1.0, while deviations from this ratio lead to a reduced overpressure risk. These findings provide valuable insights into the explosion relief behavior of methane–hydrogen mixtures and offer essential guidance for the design of explosion mitigation systems and the development of risk management strategies.
AB - In the context of the “dual-carbon” initiative, incorporating hydrogen into natural gas has emerged as a promising strategy for hydrogen energy utilization, drawing increasing attention from various industries. However, the associated risks of combustion and explosion warrant thorough investigation. This study systematically examines the pressure dynamics and flame behavior of methane–hydrogen mixtures in confined spaces under varying conditions. The results reveal a non-monotonic decay in outdoor overpressure during vented explosions. At high hydrogen doping ratios (80 %–100 %), the growth in peak overpressure diminishes, and the average flame propagation speed stabilizes. An increase in the venting coefficient reduces peak overpressure, delays explosion development, and decreases flame speed, with a critical range identified between 0.15 and 0.18 for 20 % hydrogen doping. Furthermore, within a side ratio range of 0.5–2.0 and under constant enclosure volume and height, the explosion overpressure peaks at a side ratio of 1.0, while deviations from this ratio lead to a reduced overpressure risk. These findings provide valuable insights into the explosion relief behavior of methane–hydrogen mixtures and offer essential guidance for the design of explosion mitigation systems and the development of risk management strategies.
KW - Hydrogen doping ratio
KW - Indoor explosion
KW - Pressure characteristics
KW - Side ratio
KW - Venting coefficient
UR - http://www.scopus.com/inward/record.url?scp=105004557188&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2025.04.100
DO - 10.1016/j.ijhydene.2025.04.100
M3 - Article
AN - SCOPUS:105004557188
SN - 0360-3199
VL - 135
SP - 571
EP - 585
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
ER -