Distribution of OH and CH Radicals in the Boundary Layer with Ethanol Combustion

被引：0
作者：
B. F. Boyarshinov
V. I. Titkov
S. Yu. Fedorov
机构：
[1] Russian Academy of Sciences,Kutateladze Institute of Thermophysics, Siberian Division
来源：
Combustion, Explosion and Shock Waves | 2005年 / 41卷
关键词：
boundary layer; combustion; turbulence; radicals; fluorescence;
D O I：
暂无
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学科分类号：
摘要：
The influence of free-stream turbulence on the distributions of CH and OH radicals is studied with the use of optical methods of measurements in focused beams. The data on CH concentration are obtained for the minimum level of turbulence, and the OH concentration profiles are obtained for three levels of velocity fluctuations: 1, 8, and 18. It is shown that the regions where the OH and CH radicals are observed in the laminar boundary layer are shifted from the temperature maximum toward the oxidizer zone and toward the fuel zone, respectively. The highest level of the OH concentration is close to values typical of hydrogen combustion. The root-mean-square fluctuations of velocity and the mean values of the OH concentration vary nonmonotonically along the flame.
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页码：379 / 385
页数：6
相关论文
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  • [1] Boyarshinov B. F.(1998)Analysis of experimental data on heat and mass transfer in a boundary layer Combust., Expl., Shock Waves 34 183-190
  • [2] Boyarshinov B. F.(2001)Effect of free-stream turbulence on the boundary-layer structure with diffusion combustion of ethanol J. Appl. Mech. Tech. Phys. 42 972-978
  • [3] Titkov V. I.(1982)Velocity and temperature fluctuations in a flat plate boundary layer diffusion flame Combust. Sci. Technol. 27 133-142
  • [4] Ueda T.(2000)Laser-diagnostic multi-species imaging in strongly swirling natural gas flames Appl. Phys. B 71 741-746
  • [5] Mizomoto M.(2003)Simultaneous measurements of velocity and CH distribution. Part I: Jet flame in co-flow Combust. Flame 132 565-590
  • [6] Ikai S.(2004)Measurement of temperature and concentration of OH radicals in combustion of hydrogen and ethanol by the laser-induced fluorescence technique Combust., Expl., Shock Waves 40 511-515
  • [7] Kobayashi T.(2003)Temperature and OH concentration measurements in alcohol-air flame using laser-induced fluorescence Combust., Expl., Shock Waves 39 243-247
  • [8] Bockle S.(1988)Planar laser-induced fluorescence imaging J. Quant. Spectrosc. Radiat. Transfer 40 343-362
  • [9] Kasenvadel J.(1999)Absolute CH concentration measurements by cavity ring-down spectroscopy in an atmospheric diffusion flame Chem. Phys. Lett. 305 334-342
  • [10] Kunzelman T.(2000)Simultaneous laser-induced fluorescence and Rayleigh scattering measurements of structure in partially premixed flames Appl. Phys. B 71 733-740
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