Soot formation and temperature structure in small methane–oxygen diffusion flames at subcritical and supercritical pressures
Soot formation and temperature structure in small methane–oxygen diffusion flames at subcritical and supercritical pressures
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DOI：
10.1016/j.combustflame.2009.11.003
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发表时间：
2010-06
影响因子：
4.4
通讯作者：
H. Joo;Ö. Gülder
中科院分区：
文献类型：
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作者：
H. Joo;Ö. Gülder
进行了一项实验研究，以检查高达 100 个大气压的层流甲烷-氧气扩散火焰的特性。使用非侵入式视线光谱烟灰排放诊断技术，在高压燃烧室中 10-90 个大气压的压力范围内研究了压力对烟灰形成和温度场结构的影响。甲烷和纯氧扩散火焰的外观有两个不同的区域：内部发光区域类似于甲烷-空气扩散火焰，外部扩散火焰区域大部分为蓝色。以可见烟灰辐射发射为标志的火焰高度在 10-100 个大气压的压力范围内降低了 50% 以上。在 10 到 40 个大气压之间，烟灰水平随着压力的增加而增加；然而，在 40 个大气压以上，烟灰浓度随着压力的增加而降低。
An experimental study was conducted to examine the characteristics of laminar methane–oxygen diffusion flames up to 100atmospheres. The influence of pressure on soot formation and on the structure of the temperature field was investigated over the pressure range of 10–90atmospheres in a high-pressure combustion chamber using a non-intrusive, line-of-sight spectral soot emission diagnostic technique. Two distinct zones characterized the appearance of a methane and pure oxygen diffusion flame: an inner luminous zone similar to the methane–air diffusion flames, and an outer diffusion flame zone which is mostly blue. The flame height, marked by the visible soot radiation emission, was reduced by over 50% over the pressure range of 10–100atmospheres. Between 10 and 40atmospheres, the soot levels increased with increasing pressure; however, above 40atmospheres the soot concentrations decreased with increasing pressure.