High-resolution simulations of rotor/vortex-wake interaction for a UH60-A rotor under BVI and dynamic stallconditions were carried out with the OVERFLOW Navier-Stokes code.a. The normal force and pitching moment variation with azimuth angle were in good overall agreementwith flight-test data, similar to other CFD results reported in the literature.b. The wake-grid resolution did not have a significant effect on the rotor-blade airloads. This surprisingresult indicates that a wake grid spacing of (Delta)S=10% ctip is sufficient for engineering airloads predictionfor hover and forward flight. This assumes high-resolution body grids, high-order spatial accuracy, anda hybrid RANS/DDES turbulence model.c. Three-dimensional dynamic stall was found to occur due the presence of blade-tip vortices passing overa rotor blade on the retreating side. This changed the local airfoil angle of attack, causing stall, unlikethe 2D perspective of pure pitch oscillation of the local airfoil section.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Navier-Stokes Simulation of UH-60A Rotor/Wake Interaction Using Adaptive Mesh Refinement


    Beteiligte:

    Kongress:

    AHS International Annual Forum & Technology Display ; 2017 ; Fort Worth, TX, United States


    Erscheinungsdatum :

    2017-05-09


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch






    Detached Eddy Simulation of the UH-60 Rotor Wake Using Adaptive Mesh Refinement

    Chaderjian, N.M. / Ahmad, J. / Vertical Flight Technical Society | British Library Conference Proceedings | 2012


    Detached Eddy Simulation of the UH-60 Rotor Wake Adaptive Mesh Refinement

    Chaderjian, Neal M. / Ahmad, Jasim U. | NTRS | 2012


    Parallelization of Unsteady Adaptive Mesh Refinement for Unstructured Navier-Stokes Solvers

    Schwing, A. / Nompelis, I. / Candler, G. et al. | British Library Conference Proceedings | 2014