Local Reaction Zone Configuration of High Intensity Turbulent Premixed Flames
Local Reaction Zone Configuration of High Intensity Turbulent Premixed Flames
复制标题
高强度湍流预混火焰的局部反应区配置
DOI：
10.1080/00102209308907614
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
T. Hirano
中科院分区：
文献类型：
--
作者：
J. Furukawa;K. Maruta;Tomohiro Nakamura;T. Hirano
摘要本研究采用两个相同传感器的微型静电探针，对高强度湍流预混火焰的局部反应区结构进行了详细的研究。局部反应区的配置示出通过分析离子电流波动来确定。局部反应区曲率半径的检查和频率分布表示。向未燃混合物凸出的局部反应区的曲率半径比向已燃气体凸出的局部反应区的曲率半径分布在更宽的范围内。局部反应区曲率的平均半径随湍流强度的增大而减小，而最小曲率半径和最可几曲率半径随湍流强度的变化不大。本研究中测量的最可几曲率半径和平均曲率半径都大于湍流的微观尺度。认为即使在Kolmogoroff尺度小于层流火焰的强湍流中，火焰的燃烧速度也会随着湍流的增加而增加。
Abstract The present study has been performed to explore the local reaction zone configuration of high intensity turbulent premixed flames in detail by using a micro-electrostatic probe of two identical sensors. The local reaction zone configuration is shown to be determined by analyzing the ion current fluctuations. The radii of the local reaction zone curvatures are examined and expressed in frequency distribution. The radii of curvatures of the local reaction zone convex toward unburned mixture are distributed in a wider range than those convex toward burned gas. The mean radius of the local reaction zone curvatures decreases as the turbulent intensity increases, while the smallest and the most probable radii of curvatures scarcely change with the turbulent intensity. Both the most probable and the mean radii of curvatures measured in the present study are larger than the micro scale of turbulence. It is presumed that even in intense turbulence, whose Kolmogoroff scale is smaller than a laminar flame t...