封闭矩形直管内的天然气/空气预混火焰传播  

Premixed Flame Propagation of Natural Gas/Air Mixtures in a Closed Rectangular Tube

作　　者：彭忠璟 熊涛 段强领 金凯强[1] 肖华华[3] 沈晓波[4] 王青松[1] 孙金华[1] Peng Zhongjing Xiong Tao Duan Qiangling Jin Kaiqiang Xiao Huahua Shen Xiaobo Wang Qingsong Sun Jinhua(State Key Laboratory of Fire Science,University of Technology and Science of China,Hefei 230027,China No.1 Gas Production Plant of Xinjiang Oilfield Company,Kelamayi 834000,China A James Clark School of Engineering,University of Maryland,College Park,Maryland MD20742,USA School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,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 [2]新疆油田公司采气一厂,克拉玛依834000 [3]马里兰大学帕克分校詹姆斯克拉克工程学院,马里兰州md20742 [4]华东理工大学资源与环境工程学院,上海200237

出　　处：《燃烧科学与技术》2016年第5期419-425,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51376174;51406191);中国科学技术大学火灾科学国家重点实验室开放课题资助项目(HZ2015-KF12)

摘　　要：采用高速-纹影摄像和压力测试技术,对不同当量比的天然气/空气预混火焰结构、传播速度特性以及压力特性开展了实验研究.分析了预混火焰传播过程及Tulip火焰形成机理,并与同等条件下甲烷/空气预混燃烧过程进行了对比.结果表明,当量比对预混火焰传播有重要影响,直接表现在火焰结构变化、形状演化和传播速度等方面;Tulip火焰的形成伴随着火焰传播速度的骤降;二元可燃气体中加入活性较强的气体组分,将加快火焰传播速度,危险性更大.The characteristics of premixed natural gas/air flame structure,propagation and pressure rise at differentequivalence ratios were studied using high-speed schlieren photography and pressure transducer.Premixed flamepropagation and the underlying mechanisms of Tulip flame were explored through experimental measurement andanalysis.The flame behavior was also compared with that of premixed methane-air flame under the same conditions.The results show that the influence of equivalence ratio on flame propagation lies directly in the changes inflame structure,flam shape and flame propagation speed.Tulip flame formation is accompanied by drastic flamedeceleration.In addition,the addition of a highly reactive gas to a binary gas mixture can increase propagation speedand pose a higher danger.

关 键 词：天然气 预混火焰 传播特性 Tulip火焰 

分 类 号：X932[环境科学与工程—安全科学]