湿度变化对双旋流合成气非预混燃烧特性的影响  

Influence of Humidity on a Double-Swirled Non-Premixed Syngas Burner

作　　者：葛冰[1] 田寅申[1] 谢岳生 臧述升[1] 

机构地区：[1]上海交通大学动力机械及工程教育部重点实验室,上海200240 [2]上海电气电站集团技术研究与发展中心,上海201612

出　　处：《上海交通大学学报》2014年第6期746-749,755,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(51206109)资助项目

摘　　要：利用平面激光诱导荧光（PLIF）、高温细丝热电偶及红外气体分析仪对不同空气湿度下的双旋流合成气非预混燃烧流场进行了实验研究.实验结果表明,随着空气湿度的增加,合成气火焰的基本形态已经发生很大变化,燃烧室中心轴线处OH自由基浓度越来越低,荧光信号强度明显变弱,火焰根部逐渐出现W型分布特征,燃烧室排气温度缓慢下降;当空气加湿量φ（空气中水蒸气体积与干空气体积之比）为0-30%时,CO排放量变化不大,但是当φ=40%时CO排放迅速增加,而当φ=50%时,CO排放已经不稳定,燃烧振荡,容易熄火.此外,NOx排放随着φ增加下降明显,但是当φ〉20%时,NOx排放的下降趋势会变慢,继续增加水蒸气对NOx排放的影响不大.Experiments were performed to investigate the influence of humidity on a double-swirlded non- premixed syngas burner. Planar laser-induced fluorescence （PLIF） of OH radical measurement was adopted to identify main reaction zones and burnt gas regions as well. Together with the temperature and emission measurements during the exhaust section, some important characteristics of the syngas flame were in- vestigated in detail. The results indicate that fluorescent signal strength of OH radicals pronounce weakening, and the flame gradually show a W type distribution with the increase of humidification amount. CO missions in combustor change little when φ is in the range of 0 to 30 %, but increase quickly when φ is over 40 %. NOx missions in combustor reduce continuously with the humidity of air increaseing. However, the slope of NOx descending decreases when φ is over 20 %.

关 键 词：双旋流燃烧 合成气燃烧 湿空气燃烧 平面诱导荧光测量 

分 类 号：TK16[动力工程及工程热物理—热能工程] O357[理学—流体力学]