A new approach to optimize the geometry of a turbine airfoil by simultaneously designing multiple 2D sections of the airfoil is presented in this paper. The complexity of 3D geometry modeling is circumvented by generating multiple 2D airfoil sections and constraining their geometry in the radial direction using first- and second-order polynomials that ensure smoothness in the radial direction. The flow fields of candidate geometries obtained during optimization are evaluated using a quasi-3D, inviscid, CFD analysis code. An inviscid flow solver is used to reduce the execution time of the analysis. Multiple evaluation criteria based on the Mach number profile obtained from the analysis of each airfoil cross-section are used for computing a quality metric. A key contribution of the paper is the development of metrics that emulate the perception of the human designer in visually evaluating the Mach Number distribution. A mathematical representation of the evaluation criteria coupled with a parametric geometry generator enables the use of formal optimization techniques in the design. The proposed approach is implemented in the optimal design of a low-pressure turbine nozzle.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Turbine Airfoil Optimization Using Quasi-3D Analysis Codes


    Beteiligte:
    Sanjay Goel (Autor:in)


    Erscheinungsdatum :

    2009




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt




    Transonic airfoil codes

    Garabedian, P. R. | NTRS | 1979



    Design and Optimization of Tidal Turbine Airfoil

    Grasso, F. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2011


    Design and Optimization of Tidal Turbine Airfoil

    Grasso, F | Online Contents | 2012


    Turbine airfoil assembly

    KERBER ONIKA MISASHA / ITZEL GARY MICHAEL / VEHR JAMES WILLIAM et al. | Europäisches Patentamt | 2015

    Freier Zugriff