An experimental investigation was conducted on a scaled annular pogo accumulator for the Ares I Upper Stage. The test article was representative of the LO2 feedline and preliminary accumulator design, and included multiple designs of a perforated ring connecting the accumulator to the core feedline flow. The system was pulse tested in water over a range of pulse frequency and flow rates. Time dependent measurements of pressure at various locations in the test article were used to extract system compliance, inertance, and resistance. Results indicate a significant deviation from standard orifice flow theory and suggest a strong dependence on feedline average velocity. In addition, several CFD analyses were conducted to investigate the details of the time variant flow field. Both two-dimensional and three-dimensional simulations were performed with time varying boundary conditions used to represent system pulsing. The CFD results compared well with the sub-scale results and demonstrated the influence of feedline average velocity on the flow into and out of the accumulator


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    Title :

    Experimental Investigation and Analysis of an Annular Pogo Accumulator


    Contributors:
    Peugeot, John (author) / Zoladz, Tom (author) / Case, Nick (author) / Yang, H. Q. (author)

    Conference:

    57th JANNAF Joint Propulsion Meeting ; 2010 ; Colorado Springs, CO, United States
    5th Liquid Propulsion Meeting ; 2010 ; Colorado Springs, CO, United States
    7th Modeling and Simulation Meeting ; 2010 ; Colorado Springs, CO, United States
    4th Spacecraft Propulsion Joint Subcommittee Meeting as the fourth 4th Spacecraft Propulsion Joint Subcommittee Meeting as the fourth 4th Spacecraft Propulsion Joint Subcommittee Meeting as the fourth 4th Spacecraft Propulsion Joint Subcommittee Meeting ; 2010 ; Colorado Springs, CO, United States


    Publication date :

    2010-05-03


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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