Transition from hover to forward flight and vice versa represents the most critical flight phase of tiltwing aircraft. Despite its importance to ensure a safe operation, the aerodynamics of this maneuver are not sufficiently understood. This paper focuses on the study of transition flight for NASA’s six-passenger tiltwing air taxi by means of high-fidelity computational fluid dynamics simulations. On the basis of a static trim solution, four points within the transition corridor are analyzed: transition mode at wing tilt angles of60and44, and airplane mode at airspeeds of110 ktand155 kt. We investigate the balance of forces and moments for rotor-borne and wing-borne regimes, and how rotor-on-rotor and rotor-on-wing interactions affect performance. The simulations indicate that during the early stages of transition, the vortices remain in close proximity to the proprotors, inducing large fluctuations on the order of the mean blade loading. Additionally, the blowing and swirling effects of the proprotor wakes delay flow separation over a portion of the wing. The mid-transition conditions appear to be critical, with extensive regions of separated flow over the wing. In airplane mode, proprotor-wing slipstream effects can be exploited to enhance lift generation. The results of this paper contribute to a deeper understanding of the complex aerodynamic interactions during transition flight to enable a safer and more efficient operation of tiltwing aircraft.


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    Titel :

    Tiltwing Transition Flight Analysis Using High-Fidelity CFD


    Beteiligte:
    D. G. Perez (Autor:in) / P. V. Diaz (Autor:in) / A. Sanguinetti (Autor:in) / S. S. Yoon (Autor:in)

    Erscheinungsdatum :

    2024


    Format / Umfang :

    27 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


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    Garcia Perez, David / Ventura Diaz, Patricia / Yoon, Steven | AIAA | 2023


    High-Fidelity Simulations of a Tiltwing Vehicle for Urban Air Mobility

    David Garcia Perez / Patricia Ventura Diaz / Seokkwan Yoon | NTRS | 2023


    Flight Control System of a Tiltwing UAV

    Ostermann, Tobias | British Library Conference Proceedings | 2016


    X-Tiltwing Aircraft

    GRONINGA KIRK LANDON / ROBERTSON DANIEL BRYAN | Europäisches Patentamt | 2018

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