The use of Krylov subspace iterative methods for the implicit solution of rotary-wing flowfields on parallel computers is explored. A Newton-Krylov scheme is proposed that couples conjugate-gradient-like iterative methods within the baseline structured-grid Euler/Navier-Stokes flow solver transsonic unsteady rotor Navier-Stokes. Two Krylov methods are studied, generalized minimum residual end orthogonal s-step orthomin. Preconditioning is performed with a parallelized form of the lower-upper symmetric Gauss-Seidel operator. The scheme is implemented on the IBM SPZ multiprocessor and applied to three-dimensional computations of a rotor in forward flight. The Newton-Krylov scheme is found to be more robust and to attain a higher level of time accuracy in implicit time stepping, increasing the allowable time step. The method yields approximately a 20 % reduction in solution time with the same level of accuracy in time-accurate calculations but requires more memory than do more traditional implicit techniques.


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    Titel :

    Parallel Newton-Krylov method for rotary-wing flowfield calculations


    Weitere Titelangaben:

    Paralleler Newton-Krylov-Algorithmus zur Berechnung des Strömungsfeldes eines Drehflügels


    Beteiligte:
    Wissink, A.M. (Autor:in) / Lyrintzis, A.S. (Autor:in) / Chronopoulos, A.T. (Autor:in)

    Erschienen in:

    AIAA Journal ; 37 , 10 ; 1213-1221


    Erscheinungsdatum :

    1999


    Format / Umfang :

    9 Seiten, 8 Bilder, 3 Tabellen, 33 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





    A parallel Newton-Krylov method for rotorcraft flowfield calculations

    Wissink, Andrew / Lyrintzis, Anastasios / Chronopoulos, Anthony | AIAA | 1997


    Parallel NewtonKrylov Method for Rotary-Wing Flowfield Calculations

    Andrew M. Wissink / Anastasios S. Lyrintzis / Anthony T. Chronopoulos | AIAA | 1999


    Parallel Newton-Krylov methods for rotorcraft aerodynamics

    Ekici, Kivanc / Lyrintzis, Anastasios | AIAA | 2001


    Progress in Newton-Krylov Methods for Aerodynamic Calculations

    Pueyo, A. / Zingg, D. W. / AIAA | British Library Conference Proceedings | 1997