Numerical Simulation of Combustion Organization in Ramjet of RBCC Engine
Numerical simulation of kerosene spray combustion in a model RBCC combustor with pylon mixing strengthen and cavity flame holder are carried out to investigate the combustion organization and flame stabilization. Kerosene is injected through the pylon and main strut. The k-ω SST turbulence model is taken and Lagrangian dispersed-phase analysis is considered for fuel droplet evaporation and mixing in the air stream. Liquid phase evaporation and mixing process in air stream were taken into account and a three-step reduced kerosene combustion kinetic mechanism is adopted. The results indicate that the pylon injectors lead to an enhancing mixing capability of kerosene and airflow, meanwhile the cavity can improve the kerosene residence time in the combustor. The primary rocket plume has an important effect on improving the engine performance due to the fuel and airflow is previously heated. By which the kerosene atomization and spray evaporation effects are enhanced. Moreover, the formation of thermal throat, and specific impulse were analyzed in the present study. Further studies have shown the distance between cavities and pylons and the mass of fuel distribution in the combustor exert significant effects on the performance of RBCC.
RBCC ramjet kerosene flame stabilization
PAN Ke-wei HE Guo-qiang QIN Fei TANG Xiang
Science and Technology on Combustion, Internal Flow and Thermal-structure Laboratory Northwestern Polytechnical University,Xian, China
国际会议
4th International Symposium on Jet Propulsion and Power Engineering(第四届喷气推进与动力工程国际会议 ISJPPE2012)
西安
英文
702-707
2012-09-10（万方平台首次上网日期，不代表论文的发表时间）