Inlet Particle Separator (IPS) systems play a very crucial role in the operation of helicopter engines in severe sand environments. Sand ingestion causes severe performance degradation, excessive wear, increased maintenance and eventually premature failure of the engines. Parameters such as sand size, shape factor, engine inlet angle to the approaching flow, splitter position, inlet wall rebound characteristics, inlet and scavenge vanes and struts have pronounced effects on the scavenge efficiency. In order to extend the life of helicopter engines in severe sand environments, these effects must be investigated and new and innovative IPS system concepts and technologies must be explored. Effects of engine inlet angle with respect to flow and realistic wall rebound characteristics were reported by these authors previously. This numerical study, which is the continuation of that work, studies the effects of sand shape (non-spherical), density and distribution at the engine inlet on the scavenge efficiency. Three-dimensional Navier-Stokes equations for air and the conservation quations in the Lagrangian framework for the sand particles in non-elastic collision with the inlet walls were solved simultaneously. Sand particle distribution, density and shape factor for four engine inlet geometries were analyzed and particle paths and scavenge efficiencies were compared.


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    Titel :

    A numerical study of sand particle distribution, density and sand shape effects on the scavenge efficiency of engine Inlet Particle Separator systems


    Beteiligte:
    Taslim, M.E. (Autor:in) / Spring, Samuel D. (Autor:in) / Tingle, Walter J. (Autor:in) / Oliver, Wayne R. (Autor:in)


    Erscheinungsdatum :

    2005


    Format / Umfang :

    11 Seiten, 16 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch






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