Flame chemiluminescence from CO2- and N2-diluted laminar CH4/air premixed flames

An experimental and numerical investigation of the chemiluminescence signals from OH*, CH*, and CO2* is conducted for laminar premixed conical CH4/air flames diluted with CO2 or N2. Experiments are conducted either at fixed equivalence ratio or fixed adiabatic flame temperature. An ICCD camera, equipped with different narrow bandpass filters, is used to record flame images at 307 nm (OH*), 430 nm (CH*), and 455 nm (CO2*). A spectrometer is also...