声学驱动非预混火焰接近吹熄状态的动力学过程

2019/07/23   下载量： 1 次

方案摘要

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应用领域 能源/新能源
检测样本 煤炭
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参考标准 暂无

采用LaVision的高速图像增强器HS-IRO，Photron SA1.1 高速CMOS相机，以及SIRAH Credo型高速染料激光器，构成了一套时间分辩高速平面激光诱导荧光测量系统。并用这套系统研究了声学驱动非预混火焰接近吹熄状态的动力学过程

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The effect of forced oscillations on the behaviour of non-premixed swirling methane flames close to the lean blow out limits was investigated using experiments in a lab-scale burner. Two different fuel injection geometries, non-premixed with radial -NPR- and non-premixed with axial -NPA- fuel injection, are considered. The flame behaviour is studied using 5 kHz OH∗ chemiluminescence and OH Planar Laser Induced Fluorescence (OH PLIF) imaging. In both systems, acoustic forcing reduces the stability of the flame, and in particular, the stability was found to decrease with the increase in forcing amplitude. Flame lift-off was observed in both configurations, with the magnitude of the effect of forcing depending on the fuel injection configuration. The results provide insight on the effect of superimposed flow field fluctuations in systems operating close to the lean blow out limits and offer useful data for the development and validation of numerical models for the prediction of the dynamic behaviour of flames of industrial interest.

上一篇 在一个双稳湍流涡旋火焰中，对间歇性动态的时间-频率定位
下一篇 引燃对湍流火焰结构的影响

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北京欧兰科技发展有限公司
金牌会员 丨 第17年
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