摘要
为考察以多孔介质壁面为进气壁面的微燃烧器的最小稳燃空间,该文以多孔介质表面平面火焰为对象,以甲烷/空气预混气为燃料进行点火及熄火实验研究。实验中采用与多孔介质表面平行的可控温铜板来模拟燃烧室壁面,详细考察了不同燃料当量比和预混气流速时,铜板壁面温度对点火距离和熄火距离的影响。实验结果表明:当量比处于0.9~1.0之间最容易点火;在相同的当量比下,随着预混气流速的增大,点火距离先逐步减小后增大。随着平板壁面温度的提高,点火距离和熄火距离同时减小,分析认为,热熄火是其熄火的主要因素。
In order to investigate the smallest distance for stable combustion of micro combustor whose chamber was made of porous materials, the ignition and extinction experimental study of methane/air premixed flames on porous wall surface was done. In experiment a temperature-controlled copperplate which paralleled to porous wall surface was used to simulate the wall of combustor. Effect of temperature of copperplate on igniting distance and quenching distance was investigated at different gas flow velocity and equivalence ratio in detail. The results show that flame is easily ignited when equivalence ratio is between 0.9 and 1.0. With the increase of premixed gas flow velocity, igniting distance decreases gradually and further increases at the same equivalence ratio. Igniting distance and quenching distance decrease meanwhile with increasing surface temperature of copperplate. It is considered that thermal quenching is the main reason for flame quenching.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2011年第20期46-51,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(50776090)
重大国际(地区)合作项目(50721140651)~~
关键词
微燃烧器
多孔壁面
壁面温度
点火距离
熄火距离
micro combustor
porous wall
surface temperature
igniting distance
quenching distance
作者简介
冯耀勋(1978-),男,博士研究生,广东海洋大学讲师,现从事微尺度火焰稳定性研究,fengyx@ms.giec.ac.cn;
王勇(1984-),男,硕士研究生,研究方向为新型低热损微小燃烧器开发;
蒋利桥(1974-),男,博士,副研究员,从事微尺度燃烧及新型燃烧器开发;
赵黛青(1958-),女,博士,研究员,从事微尺度流动和燃烧解析的研究,本文通讯作者,zhaodq@ms.giec.ac.cn;
汪小憨(1978-),男,博士,副研究员,从事微尺度流动和燃烧解析的研究。