모델연소실 내 압력 변화가 메탄/산소 이원추진제의 연소특성에 미치는 영향

Liquid methane (CH 4 )/oxygen (O 2 ) bipropellant have been recently considered as a next-generation propellant due to eco-friendly and non-toxic properties, low cost and high performance such as specific impulse and regenerative cooling capability. In this study, the combustion characteristics of gaseous CH 4 /O 2 nonpremixed coflow flames in a model combustor with variation of internal pressure are investigated through measuring the combustion stability limits and visualizing flames and flow. Results show that the combustion stability limits are extended and reaction intensity (OH* intensity) is enhanced with increasing internal pressure of the combustion chamber for fuel-rich condition.