Masamichi Ipponmatsu

Visualization of the CH Molecule by Exciting C2Σ+(v=1) State in Turbulent Flames by Planar Laser-Induced Fluorescence

A novel visualization technique for the CH molecule has been demonstrated. The technique described in this paper is the CH visualization by exciting the C2Σ+ state which predissociates and gives the opportunity of semi-quantitative CH visualization at a significantly high pressure. The visualization methods have been developed by taking practical application into account, and the detection wavelength is made different from that of excitation in order to avoid the stray light problem. In addition, CH can be visualized by a single-shot laser, and this technique has been proven to be applicable for the analysis of nonstationary chemical reactions such as turbulent flames. Furthermore, the visualization results show good spatial resolution, sufficient signal level, and greatly improved image quality.