A computational study of a nano coaxial rotor with bioinspired blade motion was conducted at an ultralow Reynolds number to determine the principle of improving rotor performance via an induced unsteady mechanism. A flow solver was established based on the preconditioned compressible Navier–Stokes equations, a lower-upper Symmetric-Gauss-Seidel with pseudo time sub-iteration (LUSGS-τts) dual-time marching method, and an overset grid technique. The effect of different pitching rotors on the nano coaxial rotor performance was investigated. A pitching upper rotor slightly impacted the nonpitching lower rotor, whereas it significantly affected the pitching lower rotor. Four blade pitching frequencies were applied successively to the upper rotor to investigate the effect of pitching frequency on rotor performance. The results indicated that the greatest improvement in figure of merit occurred at a blade pitching frequency of 4/revolution. The figure of merit values for the upper rotor and lower rotor were 7.2% and 6.7%, respectively. The generation and evolution of the leading-edge vortex and trailing-edge vortex led to reattachment of flow in cases in which the rotor performance was improved.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Investigation of Bioinspired Flow for a Nano Coaxial Rotor in Hover


    Beteiligte:
    Liu, Zhen (Autor:in) / Li, Shiqi (Autor:in) / Ren, Yulin (Autor:in) / Hu, Dike (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2021-01-23




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Unbekannt




    COAXIAL ROTOR BROADBAND NOISE PREDICTION IN HOVER

    Lee, S. / Shlesinger, I. | British Library Conference Proceedings | 2020


    Computational Investigation of Small Scale Coaxial Rotor Aerodynamics in Hover

    Lakshminarayan, V. / Baeder, J. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2009



    COAXIAL ROTOR BROADBAND NOISE PREDICTION IN HOVER

    Lee, S. / Shlesinger, I. | TIBKAT | 2020