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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Geometric interpretation of fractal parameters measured in turbulent premixed Bunsen flames
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Geometric interpretation of fractal parameters measured in turbulent premixed Bunsen flames

机译：湍流预混本生火焰中测得的分形参数的几何解释

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Fractal analyses have been conducted to investigate flame-front wrinkling of turbulent premixed Bunsen flames. Emphasis is placed on the geometric interpretation of measured fractal parameters and their relationship with parameters used in current combustion models. The outer cutoff scale is found to be four times the integral length scale of flame-front wrinkling defined in the Bray-Moss-Libby model. A revised Gibson length scale is derived by taking into account the curvature effect. Dependency of the revised Gibson scale on the Karlovitz number agrees better with the bulk of available data for the inner cutoff scale than the original definition. The term "self-similarity dimension" is proposed for the fractal dimension measured at finite spatial resolution to highlight the self-similarity feature of local flame fronts. The self-similarity dimension is found to increase linearly with time, and correlates well with the turbulent flame brush thickness. (C) 2003 Elsevier Science Inc. All rights reserved. [References: 45]
机译：分形分析已经进行，以研究湍流预混本生火焰的火焰前皱纹。重点放在测量的分形参数的几何解释及其与当前燃烧模型中使用的参数的关系上。发现外部截止尺度是Bray-Moss-Libby模型中定义的火焰前起皱的整体长度尺度的四倍。通过考虑曲率效应得出修正的吉布森长度尺度。修订后的吉布森量表对卡洛维兹数的依赖性与内部截止量表的大量可用数据比原始定义更好。对于以有限空间分辨率测量的分形维数，提出了“自相似维数”一词，以突出局部火焰前沿的自相似特征。发现自相似性维度随时间线性增加，并且与湍流火焰刷厚度密切相关。 （C）2003 Elsevier Science Inc.保留所有权利。 [参考：45]

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