掺氢甲烷非预混射流火研究现状及展望  

Advances and the prospect of research on blended hydrogen-methane non-premixed jet flame

作　　者：肖华华[1] 赵春祥 XIAO Hua-hua;ZHAO Chun-xiang(State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230027,China)

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230027

出　　处：《安全与环境学报》2022年第6期3094-3103,共10页Journal of Safety and Environment

基　　金：国家重点研发计划项目(2021YFB4000902);中央高校基本科研业务费专项(WK2320000048);国家自然科学基金项目(51976210)。

摘　　要：氢输运是推广和发展氢能的关键环节之一,其中将氢气掺入天然气(主要成分为甲烷)管网的策略是解决氢输运问题的一种新的有效途径。然而,输气管道一旦发生泄漏则易引发非预混射流火火灾事故。因此,研究掺氢甲烷非预混射流火对灾前风险评估和灾后应急处置均具有重要意义。首先介绍掺氢甲烷射流火研究的意义;接着阐述非预混射流火特性与稳定机制,综述前人关于掺氢比例(氢气所占掺氢甲烷的体积分数)与伴流特征对掺氢甲烷非预混射流火特性影响的研究进展,进一步评价归纳其性能与应用场景;最后对前人的工作进行总结,并对未来的研究进行展望。Hydrogen transportation is a key factor in the promotion and development of hydrogen energy.The strategy of blending hydrogen into natural gas(the main component is methane)pipeline network is a new and effective way to solve the problem of hydrogen transportation.However,once the gas pipeline leaks,it is easy to cause non-premixed jet fires.Therefore,it is necessary to study the characteristics and mechanism of blended hydrogen-methane non-premixed jet flame,which is of great significance for both pre-disaster risk assessments and post-disaster emergency treatments.Firstly,this paper briefly introduces the importance of hydrogen energy utilization and gas transportation safety,as well as the significance of the study about blended hydrogen-methane non-premixed jet flame.Secondly,this paper expounds on the characteristics and stability mechanism of non-premixed jet flame.In this part,the liftoff of laminar and turbulent non-premixed jet flame,as well as the blowout(blowoff)of non-premixed jet flame is involved.The triple flame theory,the premixed model,the extinction model,and the large eddy model on the stability of non-premixed jet flame are emphasized.Then,this paper reviews the research advances of the effects of two factors,hydrogen ratio,and surrounding flow,on the characteristics of blended hydrogen-methane non-premixed jet flame.The effects of hydrogen ratio on flame radicals,flame characteristic scales,flame radiation,flame temperature,pollutant emissions,and flame stability are analyzed in detail.In addition,the effects of three surrounding flows,such as coflow,swirling flow and hot flow,on the characteristics of blended hydrogen-methane non-premixed jet flame are also discussed.Furthermore,this paper evaluates the performance of blended hydrogen-methane jet flame and summarizes the application scenarios of blended hydrogen-methane.Last,this paper summarizes the previous work,and prospects the future research on blended hydrogen-methane non-premixed jet flame.In the future,more efforts should be put int

关 键 词：安全工程 氢能 掺氢甲烷 射流火 火焰特性 

分 类 号：X932[环境科学与工程—安全科学]