Since 1986 the French Space Agency, CNES, is sponsoring some comparative studies of different concepts of combined cycle engines made jointly by SNECMA, SEP, and ONERA. SNECMA and SEP recently joined their efforts in combined cycle propulsion by creating a common Joint Venture named HYPERSPACE. The recent progress of comparative studies of different combined cycle engine systems is presented focusing on the following concepts: (1) the turborocket family including the turbo rocket-ramjet and the turbo expander-ramjet; (2) the turbojet family with the turbofan-ramjet and the turboramjet; (3) the rocket-ramjet; (4) the liquefied air rocket; (4) the cooled air rocket; and (5) the scramjet which is also presently in progress. The comparison of these concepts include their theoretical performance, some design considerations and an approximate evaluation of the technological difficulties with each concept.


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    Title :

    Comparative Study of Different Systems of Combined Cycle Propulsion


    Contributors:
    P. Ramette (author) / D. Scherrer (author) / M. Doublier (author)

    Publication date :

    1990


    Size :

    11 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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