合成气预混火焰的热声振荡  

Thermo-Acoustic Oscillation of Premixed Syngas

作　　者：张晓宇[1] 张昊[1] 张彤枫[1] 朱民[1] 

机构地区：[1]清华大学热能工程系热科学与动力工程教育部重点实验室,北京100084

出　　处：《燃烧科学与技术》2012年第2期117-122,共6页Journal of Combustion Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB210106)

摘　　要：使用天然气、氢气与氮气的合成气作为燃料,在模型燃烧室中对合成气的燃烧稳定性进行实验研究,利用动态压力传感器和ICCD相同步测量技术实现对压力和火焰面的测量.实验中保持氮气体积分数恒定在20%,通过改变天然气与氢气的体积比,对不同当量比和热值下的合成气燃烧稳定性进行研究,并对热声耦合振荡模态及其变化规律进行了分析,得到了合成气燃烧热声耦合的稳定范围,实验中发现,随着氢气体积分数的增加,发生热声耦合振荡的范围逐渐增大,然而振荡强度和天然气燃烧相比有所降低,声压级降低2～3,dB.Using hydrogen, methane, nitrogen with different ratios as syngas, experiments were conducted at a variety of equivalence ratios, hydrogen volume ratios and heat power to get a stability map in a laboratory gas turbine model combustor. Dynamic pressure transducers and ICCD were employed to test the thremo-acoustic conditions. With nitrogen volume ratio fixed （20%）, thermo-acoustic oscillation was obtained as a function of hydrogen volume ratios and equivalence ratios. In order to get different modes and regularity of oscillation alteration, various hydrogen and methane volume ratios were performed. A stability map was obtained under different syngas operating conditions. It is observed that, with the increase of hydrogen content, thermo-acoustic oscillation range gets enlarged and pressure oscillations tend to become lower amplitude corresponding to methane condition.

关 键 词：燃气轮机燃烧室 合成气预混燃烧 热声耦合振荡 动态测量 

分 类 号：TK16[动力工程及工程热物理—热能工程]