Simultaneous Measurements of Concentration and Velocity in an Open Premixed Turbulent Flame
Simultaneous Measurements of Concentration and Velocity in an Open Premixed Turbulent Flame
复制标题
同时测量开放式预混湍流火焰中的浓度和速度
DOI：
10.1080/00102208008952377
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发表时间：
1980
影响因子：
1.9
通讯作者：
J. Moss
中科院分区：
文献类型：
--
作者：
J. Moss
对直径为50 mm的LPG/空气混合气中的湍流预混火焰进行了测量。火焰是典型的本生型火焰，半锥角为16°，沿与火焰锋面成约50°角的直线进行测量。浓度或进程变量c用光散射技术测量，速度u用激光多普勒测速仪测量。通过火焰的大部分发现u和c之间的相关性是正的，这表明流量是逆梯度的。U和c的联合概率密度函数(Pdf)很好地模拟了基本燃烧和未燃烧的气体，只有很小的部分反应气体的贡献。未燃烧气体和燃烧气体中速度的条件pdf‘S显示燃烧气体的均值和方差都有相当大的增加。
Abstract Measurements have been made in the turbulent premixed flame in an LPG/ air mixture issuing from a 50 mm diameter pipe. The flame was of the classical bunsen type with a half cone angle of 16° Measurements were made along a line at an angle of about 50° to the normal to the flame front. Concentration, or the progress variable c, was measured by the light scatter technique and velocity u by laser Doppler velocimetry. The correlation between u and c is found to be positive through much of the flame indicating a counter-gradient flux. The joint probability density function (pdf) of u and c is well modelled by essentially burnt and unburnt gas with only a small contribution of the partially reacted gas. The conditioned pdf' s for velocity in the unburnt and burnt gas show a considerable increase in both mean and variance for the burnt gas.