INVESTIGATIONS OF LOX/CH4 FLAMES AT VERY LOW MIXTURE RATIO AND HIGH PRESSURE IN ROCKET ENGINE OPERATING CONDITIONS
Résumé
Experiments are conducted by Lab. EM2C, ONERA, CNES, and ArianeGroup on the cryotechnic test bench MASCOTTE to investigate conditions like those encountered on the gas generator of liquid rocket engines fed with methane and oxygen: low mixture ratio (0.3) and high pressure (26 to 60 bar). Propellants are injected through a single coaxial injection element with or without recess and in subcritical or transcritical conditions. Coupled high-speed flame visualization with backlighting imaging of the liquid jets, dynamic surface thermometry by Laser Induced Phosphorescence, and soot measurements by laser extinction are implemented simultaneously to characterize the flame and its effects.
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