Delta-winglet vortex generators (VGs) are known to enhance the heat transfer between the energy-carrying fluid and the heat transfer surfaces in plate-fin-and-tube banks. In this study optimal angles of attack of the delta-winglets are investigated based on the Pareto optimal strategy. The optimization process combines a CFD analysts, genetic algorithms and the response surface methodology. The angle of attack of a pair a delta-winglet-type VGs mounted behind each tube is varied between beta = -90 deg and +90 deg. Three circular tube rows with inline and staggered tube arrangements are investigated for Reynolds numbers from 200 to 1200 (based on the inlet height and inlet velocity). The flow structure and heat transfer behavior is analyzed in detail for certain cases and the staggered and the inline tube arrangements are compared. Finally, for each of these arrangements the optimal sets of angles of attack for different Reynolds numbers are presented.


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    Titel :

    Optimization of the angle of attack of delta-winglet vortex generators in a plate-fin-and-tube heat exchanger


    Weitere Titelangaben:

    Optimierung des Anstellwinkels von Wirbelerzeugern in Form von Delta-Winglets in einem Rippenrohrwärmeaustauscher


    Beteiligte:
    Lemouedda, A. (Autor:in) / Breuer, M. (Autor:in) / Franz, E. (Autor:in) / Botsch, T. (Autor:in) / Delgado, A. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2010


    Format / Umfang :

    14 Seiten, 16 Bilder, 2 Tabellen, 35 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch