A method is given for predicting hydraulic efficiency of a pumpjet as a function of ingested mass flow. This method is presented for a conventional pumpjet which has a stator aft of the rotor and an preswirl pumpjet which has a stator forward of the rotor. The approach uses mass averaged values of flow quantities to determine blade geometries and operating characteristics at a blade radius that is representative of the average energy input of the blade row. The space-to-chord ratio, lift coefficients, stage efficiency, and overall efficiency of the pumpjet is computed for a given vehicle as a function of advance ratio. (Stoehr)


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    Titel :

    Estimates for hydraulic efficiency and blade characteristics for preliminary pumpjet design exercise


    Weitere Titelangaben:

    Bedeutung des hydraulischen Wirkungsgrades und der Schaufelkennwerte beim Entwurf von Pumpenstrahlantrieben


    Beteiligte:
    Gearhart, W.S. (Autor:in) / Fredley, J.E. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1979


    Format / Umfang :

    65 Seiten


    Medientyp :

    Report


    Format :

    Print


    Sprache :

    Englisch




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