An analysis of the Independent Ramjet Stream (IRS) cycle is presented. The IRS cycle is a variation of the conventional ejector-Ramjet, and is used at low speed in a rocket-based combined-cycle (RBCC) propulsion system. In this new cycle, complete mixing between the rocket and ramjet streams is not required, and a single rocket chamber can be used without a long mixing duct. Furthermore, this concept allows flexibility in controlling the thermal choke process. The resulting propulsion system is intended to be simpler, more robust, and lighter than an ejector-ramjet. The performance characteristics of the IRS cycle are analyzed for a new single-stage-to-orbit (SSTO) launch vehicle concept, known as "Trailblazer." The study is based on a quasi-one-dimensional model of the rocket and air streams at speeds ranging from lift-off to Mach 3. The numerical formulation is described in detail. A performance comparison between the IRS and ejector-ramjet cycles is also presented.


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    Titel :

    Analysis of a New Rocket-Based Combined-Cycle Engine Concept at Low Speed


    Beteiligte:
    Yungster, S. (Autor:in) / Trefny, C. J. (Autor:in)

    Kongress:

    Joint Propulsion ; 1999 ; Los Angeles, CA, United States


    Erscheinungsdatum :

    1999-09-01


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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