当前位置: X-MOL 学术Process Saf. Environ. Prot. › 论文详情
Study on the Propagation Characteristics of Hydrogen/Methane/Air Premixed Flames in Variable Cross-Section Ducts
Process Safety and Environmental Protection ( IF 4.384 ) Pub Date : 2019-12-30 , DOI: 10.1016/j.psep.2019.12.029
Jian Wang; Yong Wu; Ligang Zheng; Minggao Yu; Rongkun Pan; Weiwei Shan

The flame propagation characteristics of hydrogen/methane/air mixtures with different hydrogen addition ratios (φ = 0, 10%, 20%, 30%, 40% and 50%) in different variable cross-section ducts were studied. A high-speed camera and pressure sensors were used to collect flame images and determine the overpressure dynamics. The results show that the smooth flame front will be twisted and folded, when the flame propagates to the abrupt position of the cross-section area of the duct. The larger the abrupt change rate of the duct cross-section is, the more obvious the disturbance to the flame and the more severe the turbulence. With increasing hydrogen addition ratio, the flame propagation speed and overpressure in the four kinds of variable cross-section ducts studied increase. The time for the flame front to reach the downstream end is gradually shortened, and the flame propagation time when the flame propagates from the smaller cross-section tube to the larger cross-section tube is more severely shortened with increasing hydrogen addition ratio than that when the flame propagates from the larger cross-section tube to the smaller cross-section tube. The increase of the overpressure caused by the addition of hydrogen is more significant when the flame propagates from the smaller cross-section tube to the larger cross-section tube. When the flame propagates from the smaller cross-section tube to the larger cross-section tube or from the larger cross-section tube to the smaller cross-section tube, the larger the abrupt change rate of the duct cross-section is, the larger the maximum overpressure.
更新日期:2019-12-30

 

全部期刊列表>>
化学/材料学中国作者研究精选
ACS材料视界
南京大学
自然科研论文编辑服务
剑桥大学-
中国科学院大学化学科学学院
南开大学化学院周其林
课题组网站
X-MOL
北京大学分子工程苏南研究院
华东师范大学分子机器及功能材料
中山大学化学工程与技术学院
试剂库存
天合科研
down
wechat
bug