An experimental investigation of the effect of boron (B) and aluminum (Al) additives to fuel-rich propellant for a solid fuel ramjet application was performed. In this research, depending on the composition of metal particles, three types of fuel grains with 15 wt % ammonium perchlorate particles were prepared and tested. To provide a short ignition delay, an ignition support material consisting of NC / BKNO 3 and a composite propellant were coated on the fuel grain. For the test, an oxidant gas having a controlled temperature and pressure and an oxygen composition close to that of the air in a ramjet combustor was supplied using an ethanol-blended hydrogen peroxide ( H 2 O 2 ) gas generator. Air simulant gas was supplied with an average mass flow rate near 150    g / s and a Mach number of 0.21 in the fuel grain port. Through the test, the noticeable effect of B particles on combustion was confirmed by a high regression rate over 0.5    mm / s and combustion efficiency over 80%. Al particles were not effective additives individually; however, Al particles contributed to the ignition of B. In addition, metal oxide particle deposits on the nozzle confirmed the existence of a two-phase flow.


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    Titel :

    Combustion Characteristics of Ramjet Fuel Grains with Boron and Aluminum Additives


    Beteiligte:
    Jung, Woosuk (Autor:in) / Baek, Seungkwan (Autor:in) / Park, Juhyeon (Autor:in) / Kwon, Sejin (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2018-04-30


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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