微通道内甲烷/氢气/氧气预混合火焰传播特性  

Characteristics of Premixed Methane/Hydrogen/Oxygen Flame Propagation in Microchannel

作　　者：任慧敏 潘剑锋[1] 卢青波[1] 王宇[1] 邵霞[1] Ren Huimin;Pan Jianfeng;Lu Qingbo;Wang Yu;Shao Xia(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学能源与动力工程学院,镇江212013

出　　处：《燃烧科学与技术》2019年第3期213-219,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(91641113);江苏省自然科学基金资助项目(BK20180872)

摘　　要：在石英玻璃微圆管内,进行甲烷/氢气/氧气预混合火焰传播的实验研究,分析了管径、掺氢比、当量比及入口流速对火焰传播状态和稳定火焰位置的影响规律.结果表明:实验观测到的微火焰主要有管外射流火焰、脉动火焰、稳定火焰与反复熄燃火焰;随着管径增加,稳定火焰出现在更高当量比情况下,火焰位置更靠近燃烧室入口;掺氢比越高,形成稳定火焰对应的当量比越高,火焰位置更接近出口;高当量比时,稳定火焰仅在低入口流速下能够获得,随着当量比降低,火焰能在较高入口流速下稳定;低流速下,稳定火焰在当量比为1.85～1.925时更接近燃烧室入口,随着流速增加,火焰位置更接近出口;反复熄燃火焰在管径增加时对应的当量比维持在1.79～1.93,在掺氢比增加时对应的当量比为1.79～2.12.Experimental investigations on the flame propagation characteristics of premixed methane/hydro- gen/oxygen were carried out in quartz glass microtubes. The impacts of tube diameter,mixing ratio,equivalence ratio,and inlet velocity on the flame propagation states and positions of stationary flame were analyzed. Results showed that jet flame,pulsated flame,stationary flame and oscillatory flame were observed in the experiment. Stationary flame was obtained at a high equivalence ratio,and its position approached the combustor inlet with the increase in tube diameter. At a higher mixing ratio,the stationary flame appeared at higher equivalence ratios and its position was closer to the combustor outlet. The stationary flame could only be obtained at low inlet velocities when the equivalence ratio was high,and it was stabilized at high inlet velocities when the equivalence ratio de- creased. At low inlet velocities,the stationary flame was close to the combustor inlet when the equivalence ratio varied from 1.85 to 1.925,and its position was close to the outlet with the increase in inlet velocity. The equiva- lence ratio of the oscillatory flame varied from 1.79 to 1.93 with the increase in tube diameter,as well as from 1.79 to 2.12 with the increase in mixing ratio.

关 键 词：微尺度燃烧 火焰传播状态 稳定火焰位置 甲烷/氢气/氧气 反复熄燃火焰 

分 类 号：TK50[动力工程及工程热物理—热能工程]