Analysis of chemiluminescence measurements by grey-scale ICCD and colour digital cameras
Analysis of chemiluminescence measurements by grey-scale ICCD and colour digital cameras
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DOI：
10.1088/0957-0233/25/5/055202
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发表时间：
2014-03
影响因子：
2.4
通讯作者：
F. Migliorini;S. Maffi;S. De Iuliis;G. Zizak
中科院分区：
文献类型：
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作者：
F. Migliorini;S. Maffi;S. De Iuliis;G. Zizak
在不同当量比下，对甲烷-空气预混火焰火焰前沿C2~*和CH~*自由基的发射进行了光谱、灰度级和彩色化学发光测量。为此，已经实现了适当的空间分辨率光学设备，以减少来自其他燃烧气体区域的背景发射。比较了灰度(ICCD+干涉滤光片)和RGB彩色(商用数码相机)的方法，以便找到发射强度的C2*和绿色分量以及CH*和蓝色分量之间的对应关系。在不同的当量比下研究了C2~*/CH~*的化学发光比，得到了良好的关联，表明在实际体系中检测当量比是可能的。然后将灰阶和彩色化学发光分析应用于中尺度非预混旋流燃烧器，该燃烧器以甲烷-空气混合物为燃料，运行压力为0.3兆帕。文中给出了二维计算结果，并进行了讨论。
Spectral, grey-scale and colour chemiluminescence measurements of C2* and CH* radicals' emission are carried out on the flame front of a methane–air premixed flame at different equivalence ratios. To this purpose, properly spatially resolved optical equipment has been implemented in order to reduce the background emission from other burned gas regions. The grey-scale (ICCD + interference filters) and RGB colour (commercial digital camera) approaches have been compared in order to find a correspondence between the C2* and the green component, as well as the CH* and the blue component of the emission intensities. The C2*/CH* chemiluminescence ratio has been investigated at different equivalence ratios and a good correlation has been obtained, showing the possibility of sensing the equivalence ratio in practical systems. The grey-scale and colour chemiluminescence analysis has then been applied to a meso-scale not premixed swirl combustor fuelled with a methane–air mixture and operating at 0.3 MPa. 2D results are presented and discussed in this work.