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  • Numerical Investigation of Gas-Gas Injector Combustion Chamber of FFSC

    Paper number

    IAC-05-C4.P.18

    Author

    Ms. Jin Ping, Beijing University of Aeronautics and Astronautics, China

    Coauthor

    Prof. Guobiao Cai, Beijing University of Aeronautics and Astronautics, China

    Coauthor

    Prof. Xu Xu, Beijing University of Aeronautics and Astronautics, China

    Year

    2005

    Abstract
    Numerical Investigation of Gas-Gas Injector Combustion Chamber of FFSC
    Jin Ping , Cai Guobiao , Xu Xu
    Beijing University of Aeronautics and Astronautics, Beijing, P.R. China, 100083

    The Full Flow Stage Combustion (FFSC) cycle engine is a promising system for the next generation of Reusable Launch Vehicles (RLV). One of the key components of FFSC engine is the main gas-gas injector, which would be a straightforward process without atomization and vaporization compared with liquid systems. However, not only does propellant mixing drive the performance level, it also has a significant impact on face cooling and injector durability.

    This paper focused on the investigation of influence of the gas-gas injector number on the engine performance. The fabricate cost will increase with the increase of the injector number, which will enhance the fabricate difficulty as to the same combustion chamber. Supposing the engine performance is the same, the fewer injector number is preferred.

    Three dimensional numerical simulation of FFSC combustion chamber with different injector numbers were conducted. In order to simplify the simulation, the concentric layout was selected as injector layout and shear coaxial injector as injector geometry. Seven groups of the injector number were chosen for simulation according to design guideline, such as 7, 19, 31, 49, 61, 91, and 217. The combustion efficiency of the combustion chamber was selected as engine performance parameter. The results of the investigation indicated that the combustion efficiency increased axially and with the increase of the injector number. The combustion efficiency of the 7 injectors layout combustion chamber varied slowly to reach the maximum unlike other layouts within a short distance from the injection face. In view of the injection face cooling and fabricate cost, the 19 injectors layout was the best choice.

    Abstract document

    IAC-05-C4.P.18.pdf

    Manuscript document

    IAC-05-C4.P.18.pdf (🔒 authorized access only).

    To get the manuscript, please contact IAF Secretariat.