Local chemiluminescence spectra measurements in a high-pressure laminar methane/air premixed flame

摘要: The spatially resolved chemiluminescence in the reaction zone of a laminar premised methane/air flamewas measured. pressure dependence flame front structure and spectra were examined up to 1.5 MPa. Local point measurements obtained using Cassegrain optics system that we have developed, which has high spatial resolution d=0.1 mm L=0.8 mm. Two types performed: local measurement with an ICCD camera monochromator selected intensity obtain its profile thickness at front. different pressures was identify main OH*, CH*, C2* spectra. Background related CO-O* observed greater than 0.5 Detailed OH* CH* measured pressures, results indicate each vibrational rotational peak is same location, regardless pressure. ratio OH*/CH* examined. Less on observed, although individual intensities changed increasing broadband spectrum significant MPa: remained level This background not 0.1 In order examine these profiles their pressure, locations located inside curves for all pressures.