This paper describes some of the unique challenges in balancing the thermal loads in High Altitude Long Endurance (HALE) aircraft. HALE aircraft operate in a low density and a low velocity environment making heat rejection difficult. HALE aircraft must also operate through several diurnal cycles, each creating a unique thermal environment. An optimal HALE aircraft's thermal system requires several novel concepts to overcome these challenges. The paper describes some concepts of minimizing heat loads and of rejecting waste heat effectively. Heat rejection concepts such as; surface heat exchangers, fuel tank heat sinks, and conventional radiators, are discussed relative to their respective merits and weaknesses. Heat sources such as; reciprocating engines, turbochargers, and avionics, are discussed relative to their impact on vehicle performance. Some relative measures of performance are derived that allow HALE system designers to describe sensible integrated concepts.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    HALE thermal balance


    Weitere Titelangaben:

    HALE (Grosse Hoehe-Langzeit-Flugtechnik) thermisches Gleichgewicht


    Beteiligte:
    Petkus, E.P. (Autor:in) / Gallington, R.W. (Autor:in)

    Erschienen in:

    AIAA-Papers ; Jul ; 1-7


    Erscheinungsdatum :

    1987


    Format / Umfang :

    7 Seiten, 12 Bilder, 3 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    HALE thermal balance

    PETKUS, EDWARD / GALLINGTON, ROGER | AIAA | 1987


    Zephyr HALE UAV

    Kelleher, C. / University of Bristol | British Library Conference Proceedings | 2009


    COMET HALE-BOPP

    Online Contents | 1996


    Zephyr HALE UAS

    Davey, Paul | AIAA | 2007


    Waar is Hale-Bopp?

    Online Contents | 1996