弱约束条件下氢气含量对甲烷/空气燃爆特性的影响研究  

Effects of hydrogen content on methane/air deflagration characteristics under a weak constraint condition

作　　者：张蓓蓓 程扬帆 夏煜[2] 钱家祺 韦箫 ZHANG Beibei;CHENG Yangfan;XIA Yu;QIAN Jiaqi;WEI Xiao(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China;School of Chemical Engineering,Anhui University of Science and Technology,Huainan,232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]安徽理工大学化学工程学院,安徽淮南232001

出　　处：《振动与冲击》2024年第6期255-261,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金面上项目(12272001;11972046);安徽省自然科学基金优青项目(2108085Y02)。

摘　　要：该研究采用自制的可视化气体爆炸试验设备,以乳胶气球为反应容器模拟弱约束空间,研究不同氢气添加量对甲烷/空气预混气体的爆炸火焰温度场、爆炸压力以及火焰传播速度等特征参数的影响;结合试验测试和Chemkin软件模拟结果,详细分析了氢气浓度对甲烷/空气爆炸特性的影响规律。结果表明:随着氢气含量的增加,混合气体燃爆火焰温度场内部温度变低,火焰边缘温度升高;混合气体的峰值超压和最大压力上升速率均逐渐增大;由于H、O和OH自由基的摩尔分数随着氢气的添加而增加,加速了火焰传播速度。同时,通过对混合气体的敏感性分析发现,甲烷的存在在一定程度上抑制了氢气的燃烧。研究结果可为弱约束空间内氢气/甲烷/空气预混气体的意外爆炸防控提供基础数据,也可为其他可燃气体爆炸特性的研究提供试验方法。A self-made visual gas explosion experimental equipment was designed and made to simulate the weak constraint space by using a latex balloon as the reaction vessel.The characteristic parameters of the explosion flame temperature field,explosion pressure and flame propagation velocity of methane/air premixed gas with different hydrogen addition were studied.Combining the experimental test and Chemkin software simulation results,the effects of hydrogen concentration on the explosion characteristics of methane/air were analyzed in detail.The results show that as the hydrogen content increases,the temperature in the internal field of the mixed gas combustion flame becomes lower,and the temperature at the flame edge increases.Both the peak overpressure and the maximum pressure rising rates of the premixed gas increase gradually.Since the mole fractions of H,O and OH radicals increase with hydrogen addition,the flame propagation velocity is accelerated.Meanwhile,through the sensitivity analysis of the mixed-gas,it is found that the combustion of hydrogen will be inhibited by the presence of methane to a certain extent.

关 键 词：弱约束 氢气 甲烷 气体爆炸 燃爆特性 比色测温 

分 类 号：X932[环境科学与工程—安全科学]