障碍物对管道内掺氢甲烷爆炸传播特性的影响

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关键词：掺氢甲烷；障碍物；火焰形态；火焰传播速度；爆炸压力中图分类号：X932 文献标志码：ADOI：10.13800/j.cnki. xakjdxxb.2025.0505文章编号：1672-9315（2025）05-0884-11

Influence of obstacles on the explosion propagation characteristics of hydrogen-doped methane in pipelines

CHENG Fangming1，2，3，HOU Zhendong1，2，3，LUO Zhenmin13，GOU Ziyan1，2.3，CAO Mengya1，2，3

（1.ColegeoffetyScienceandEngineeing，Xi'anUniversityofcienceandTechnologyXi'an7O4Cina; 2.Xi'anKeyLboratoryofUbanPublicafetyandFreRescue，XianUniversityofScienceandTechnologXi’nChina; 3.Shaanxi Engieering Research Center for Industrial Process Safety and Emergency Rescue， Xi’an University of Science and Technology，Xi’an 710054，China）

Abstract： To investigate the influence of obstacles on the explosion propagation of hydrogen-doped methane in pipelines，a transparent explosion pipeline experimental device was used to analysis the phased characteristics of the obstruction rate and position of obstacles on the propagation of hydrogendoped methane and air premixed gas explosions，and to compare and analyze them with pure methane explosions.The results show that before the flame reaches the obstacle，the obstacle hinders the flame propagation. Hydrogen-doped methane flames are less affected by obstacles than pure methane flames， and the flame propagation speed is negatively correlated with the blockage rate; After the flame passes through the obstacle，the promoting effect of obstacles on the explosion propagation of hydrogen-doped methane is stronger than that of pure methane，and the flame propagation speed is positively correlated with the blockage rate; When the equivalence ratio is 1，the maximum flame propagation speed of hydrogen-doped methane with a hydrogen blending ratio of 20% is 5% higher than that of pure methane due to the influence of obstacles，and the increase rate of maximum explosion pressure is 10% higher; The pressure wave of hydrogen-doped methane explosion inside the barier pipeline causes multiple reflections and superposition，and the overall pressure changes from low-frequency oscillation to high-frequency oscillation attenuation.The flame exhibits a oscillation propagation characteristic of “acceleration-deceleration-reacceleration”.The research results can provide a reference for optimizing the layout and explosion-proof design of hydrogen-doped methane pipeline systems.

Key words： hydrogen-doped methane; obstacles; flame morphology; flame propagation speed; explosion pressure

0 引言

氢气长距离管道运输难度较大，目前较为成熟的方法就是将氢气掺入天然气中，利用天然气管网进行运输，氢气的添加比例按照相关标准需低于 20%[1-3] 。（剩余15177字）