Numerical Investigation on RBCC Engine Performance under Ramjet Mode by Using Strut Injection and Fuel-rich Burned Gas Piloting Combustion
Numerical studies have been performed to investigate liquid kerosene combustion in RBCC combustor under typical ramjet-mode condition. To obtain the high efficiency combustion and optimized performance under low enthalpy incoming airflow condition, investigations on fuel injection schemes based on strut injector associated with fuel-rich burned gas piloting combustion in current RBCC combustor configuration have been performed. The results show that the fuel-strut injection associated with fuelrich burned gas piloting combustion plays a crucial role to achieve steady and efficient combustion under ramjet mode. Moreover, the interactions between the fuel jets injection and the fuel-rich piloting plumes have been identified. By using CFD simulations, the comparisons indicate that the fuel injection from two fuel-strut injector behind the primary rocket exit can accomplish high-efficient combustion due to directly delivering fuel into the core region of piloting flame, thereby leading a high pressure distribution and better engine performance. The results show the injection based on fuel-strut injector is appropriate to take advantage of piloting flame, and further investigations on multistage injection including fuel-strut injection and wall injection upstream the cavity need to be further considered to optimize the engine performance.
RBCC piloting combustion ramjet mode
XU Chao-qi HE Guo-qiang LIU Pei-jin QIN Fei
Science and Technology on Combustion, Internal Flow and Thermo-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
740-746
2012-09-10（万方平台首次上网日期，不代表论文的发表时间）