The design of a NLF (natural-laminar-flow) wing for a very light jet wingbody-nacelle configuration has been described. The problem definition has been presented starting from CESAR project specifications and requirements, re-arranged to get a well-posed problem. An evolutionary optimization has been performed where the evaluation phase is given by a chain of CFD codes able to produce the whole set of defined objectives and constraints. Abatch scripting procedure has been set up within ICEM CFD commercial package to automatically generate standard quality grids around the wing-body-rear nacelle configuration. Particular emphasis has been put on the optimization strategy, given the complex and time-consuming design problem: suitable and specific airfoils have been designed first with quasi-3D aerodynamic characteristics to match wing flow conditions, the real 3D flow and the presence of fuselage and rear-mounted engine in working conditions have been simulated after to 'correct' the shape of the optimal wing airfoils and its performances. Both optimization stages have shown interesting characteristics and successful results: at the end of the design process, a wing geometry has been generated with optimal aerodynamic characteristics. In particular, the objective to design a NLF wing has been completely achieved in a wide range of working conditions. The reported work shows that a difficult and industrially challenging problem can be effectively solved using standard and well-consolidated Evolutionary Computing tools. The required computational effort, although significant, is well within the limits that can be considered acceptable in an industrial development environment.


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    Titel :

    Efficient aerodynamic optimization of a very light jet aircraft using evolutionary algorithms and Reynolds-averaged Navier-Stokes flow models


    Weitere Titelangaben:

    Effiziente aerodynamische Optimierung eines sehr leichten Strahlflugzeugs mit evolutionären Algorithmen und Reynolds-gemittelten Navier-Stokes-Strömungsmodellen


    Beteiligte:
    Iuliano, E. (Autor:in) / Quagliarella, D. (Autor:in)


    Erscheinungsdatum :

    2011


    Format / Umfang :

    21 Seiten, 42 Bilder, 5 Tabellen, 28 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch