Freejet experiments have been conducted in a shock tunnel with a small airframe-integrated three-dimensional scramjet engine. The goal of the investigation was to examine the influence of airframe integration on the engine operation. The tests were conducted at a condition replicating flight at Mach 10.4 and a dynamic pressure of 48 kPa. The internal flowpath featured a rectangular-to-elliptical shape transition inlet designed for flight at Mach 12, an elliptical combustor with a constant area and diverging section, and a three-dimensional thrust nozzle. This flowpath was integrated with a forebody and streamlined external geometry similar to what would be expected on a flight vehicle. Gaseous hydrogen fuel was injected either through portholes on the inlet or a combination of inlet injection with a series of portholes behind a rearward-facing step at the combustor entrance. Experiments at a range of fuel equivalence ratios indicated that both fuel-injection schemes produced robust combustion without the use of ignition aids. Comparison with semifreejet tests of a three-times scale engine with a truncated forebody showed a slight reduction in the overall combustion generated pressure rise in the current experiments. These results indicate that airframe integration does not lead to significant degradation in the performance of this engine. Presented as Paper 2014-2930 at the 19th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, Atlanta, GA, 16-20 June 2014


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    Title :

    Experimental Testing of an Airframe-Integrated Three-Dimensional Scramjet at Mach 10



    Published in:

    AIAA journal ; 53 , 11


    Publication date :

    2015




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    55.50 Luftfahrzeugtechnik / 55.60 Raumfahrttechnik / 55.60 / 50.93 / 55.50 / 50.93 Weltraumforschung
    Local classification TIB:    770/7040



    Experimental Testing of an Airframe-Integrated Three-Dimensional Scramjet at Mach 10

    Doherty, Luke J. / Smart, Michael K. / Mee, David J. | AIAA | 2015



    Measurement of Three-Components of Force on an Airframe Integrated Scramjet at Mach 10

    Doherty, Luke J. / Smart, Michael K. / Mee, David | AIAA | 2015


    Experimental Testing of an Airframe Integrated 3-D Scramjet at True Mach 10 Flight Conditions (AIAA 2014-2930)

    Doherty, L. / Smart, M. / Mee, D. et al. | British Library Conference Proceedings | 2014