碳氢湍流火焰中多反应区成像测量技术研究

Detection and imaging of multi-reaction zones is an essential tool for understanding the detailed structure
of complicated flames. In this work a combined 4-camera technique is presented for multi-reaction zones
imaging. The technique combines highly advanced laser-based diagnostics tools, namely Rayleigh scattering,
laser-induced predissociation fluorescence (LIPF) of OH, LIF of PAH, and LIF of formaldehyde (CH2O). The
application of this combined technique in turbulent non-homogeneous hydrocarbon flames is quite new. The
technique shows its ability to detect simultaneously rich, lean and diffusion reaction zones. The 3 reaction
zones can be spatially resolved, providing essential information about their interaction and overall flame
stability. Therefore, the detection and study of triple flame structures in non-homogeneous turbulent flames
becomes possible. An example of a triple flame structure in a turbulent lifted non-premixed methane flame
is presented. The present work proves that the developed technique is a powerful tool for multi-reaction
zone measurements in turbulent and laminar flames. PLIF平面激光诱导荧光火焰燃烧检测系统 德国LaVision PIV/PLIF粒子成像测速场仪 时间分辨平面激光诱导荧光测量系统