This paper presents an experimental study on the stability and structure of non-premixed CO2 diluted oxyfuel jet flames. DSLR imaging and OH Planar Laser-Induced Fluorescence (PLIF) were used to investigate the nearfield structure of a series of methane jet flames. Three oxidizer compositions (O2/CO2 ratios of 50/50, 40/60, and 32/68) were considered for a fixed co-flow velocity of 0.35 m/s. The PLIF Images were post-processed using MATLAB to obtain OH layer thickness, flame attachment height, and radius. Results show that increasing the CO2 level in the co-flow leads to a reduction in the OH layer thickness and sooting propensity. Both attachment radius and height were found to increase with increased CO2 content in the oxidizer. Furthermore, it was also observed that the flame attachment radius decreased as jet velocity increased while the flame attachment height tended to increase with higher jet velocity.
|Original language||English (US)|
|Title of host publication||AIAA SCITECH 2022 Forum|
|Publisher||American Institute of Aeronautics and Astronautics|
|State||Published - Jan 3 2022|