A computational investigation of a pressure-gain combustor system for gas turbine applications is presented. The system consists of a valved pulse combustor and an ejector, housed within a shroud. The study focuses on two enhancements to previous models, related to the valve and ejector components. First, a new poppet inlet valve system is investigated, replacing the previously used reed valve configuration. Secondly, a new computational approach to approximating the effects of choked turbine inlet guide vanes present immediately downstream of the Ejector-Enhanced Resonant Pulse Combustor (EERPC) is investigated. Instead of specifying a back pressure at the EERPC exit boundary (as was done in previous studies) the new model adds a converging-diverging (CD) nozzle at the exit of the EERPC. The throat area of the CD nozzle can be adjusted to obtain the desired back pressure level and total mass flow rate. The results presented indicate that the new poppet valve configuration performs nearly as well as the original reed valve system, and that the addition of the CD nozzle is an effective method to approximate the exit boundary effects of a turbine present downstream of the EERPC. Furthermore, it is shown that the more acoustically reflective boundary imposed by a nozzle as compared to a constant pressure surface does not significantly affect operation or performance.


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    Titel :

    Numerical Evaluation of an Ejector-Enhanced Resonant Pulse Combustor with a Poppet Inlet Valve and a Converging Exhaust Nozzle


    Beteiligte:
    S. Yungster (Autor:in) / D. E. Paxson (Autor:in) / H. D. Perkins (Autor:in)

    Erscheinungsdatum :

    2016


    Format / Umfang :

    12 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch





    NUMERICAL EVALUATION OF AN EJECTOR-ENHANCED RESONANT PULSE COMBUSTOR WITH A POPPET INLET VALVE AND A CONVERGING EXHAUST NOZZLE (AIAA 2016-4559)

    Yungster, Shaye / Paxson, Daniel E. / Perkins, Hugh | British Library Conference Proceedings | 2016


    Poppet exhaust-valve design

    Bissell, R.E. / Williams, G.T. | Engineering Index Backfile | 1929


    Poppet Exhaust-Valve Design

    WILLIAMS, GORDON T. / BISSELL, RICHARD E. | SAE Technical Papers | 1929


    Numerical Investigation of Shrouded Ejector-Enhanced Pulse Combustor Performance at High Pressure

    Yungster, Shaye / Paxson, Daniel E. / Perkins, Hugh D. | AIAA | 2017