A small-scale tiltrotor model was tested in the 7-by 10-foot Wind Tunnel at NASA Ames Research Center, with the goal of better understanding Vortex Ring State (VRS) effects on tiltrotor aircraft. Test objectives were to obtain performance data of a tiltrotor model over a wide range of descent conditions, to explore the effects of sideslip at these descent conditions, and to investigate the validity of using a single-rotor with a physical image plane to simulate dual rotor performance characteristics. The model consisted of a pair of 2-bladed teetering rotors with untwisted, 11.125-inch diameter, rectangular planform blades. Model configuration variations included a dual-rotor, an isolated-rotor, and a single-rotor with a physical image plane. Rotor performance data were obtained for the dual-rotor configuration operating over a wide range of descent and sideslip conditions. Isolated-rotor and single-rotor with image plane configurations were tested over an abbreviated range of descent conditions. Results of this investigation are presented and show mean thrust reductions in the region of VRS for each model configuration. In comparison with the dual-rotor configuration, the isolated-rotor and single-rotor with image plane configurations produced thrust results similar in trend but different in magnitude.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    A Wind Tunnel Investigation of a Small Scale Tiltrotor Model in Descending Flight


    Beteiligte:

    Kongress:

    American Helicopter Society Aerodynamics, Acoustics and Test and Evaluation Technical Specialists Meeting ; 2002 ; San Framcisco, CA, United States


    Erscheinungsdatum :

    2001-01-01


    Medientyp :

    Preprint


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Small-Scale Tiltrotor Model Operating in Descending Flight

    A. I. Abrego / M. D. Betzina / K. R. Long | NTIS | 2002


    A Small-Scale Tiltrotor Model Operating in Descending Flight

    Abrego, Anita I. / Betzina, Mark D. / Long, Kurtis R. | NTRS | 2002


    Investigating Tiltrotor Formation Flight via 1/48-Scale Wind Tunnel Experiment

    Romander, Ethan / Betzina, Mark / Silva, Mark et al. | NTRS | 2007


    Investigating Tiltrotor Formation Flight Via 1/48-Scale Wind Tunnel Experiment

    E. Romander / M. Betzina / M. Silva et al. | NTIS | 2006


    Investigating Tiltrotor Formation Flight Via 1/48-Scale Wind Tunnel Experiment

    Romander, Ethan / Betzina, Mark / Silva, Mark et al. | NTRS | 2006