Self-Induced Combustion Instability of Laminar Premixed Flames on a Slot Burner
Self-Induced Combustion Instability of Laminar Premixed Flames on a Slot Burner
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槽式燃烧器层流预混火焰的自致燃烧不稳定性
DOI：
10.1299/jsmeb.48.305
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
D. Santavicca
中科院分区：
文献类型：
--
作者：
Wonnam Lee;J. Lee;D. Santavicca
使用槽式燃烧器对层流预混火焰的燃烧动力学进行了实验研究。测量不同混合物流速和丙烷/空气混合物的当量比的声级和 CH* 化学发光强度。仅在燃料贫乏的条件下观察到燃烧不稳定。不稳定频率随着混合速度的增加而增加，并且测量的声级随着当量比以及混合速度的增加而增加。还使用高速 CCD 相机研究了燃烧振荡的性质，并且由火焰和涡流脱落过程之间的相互作用引起的火焰尖端的周期性突然熄灭被确定为噪声发射源。
Combustion dynamics of laminar-premixed flames is experimentally studied using a slot burner. Sound levels and CH* chemiluminescence intensity are measured for various mixture flow velocities and equivalence ratios of propane/air mixtures. Combustion instability is observed only for fuel lean conditions. The instability frequency increases with the mixture velocity and the measured sound level increases with the equivalence ratio as well as the mixture velocity. The nature of combustion oscillation is also investigated using a high-speed CCD camera and a periodic sudden extinction at the tip of flame caused by the interaction between flame and vortex-shedding process is identified as the source of noise emission.