A series of experiments was conducted in an anechoic chamber and wind tunnel to investigatethe noise and performance of an optimum hovering rotor design. The optimum hovering rotorexperimental data set presented in this paper provides the community with a rotor that istheoretically easier to model. Isolated rotors were tested in an anechoic hover chamber as wellas on a representative quadcopter vehicle. In the anechoic chamber, performance and acousticmeasurements were taken at various rotor speeds to compare to those of a commercial-off-the-shelf (COTS) rotor. In the wind tunnel, free-stream velocity, vehicle pitch, and rotor rotationrates were varied to achieve various hover and forward flight operating conditions. Previousinvestigation of a small quadcopter in the Low Speed Aeroacoustic Wind Tunnel (LSAWT) hadidentified possible broadband and interactional noise sources due to rotor airframe interactionand rotor-rotor interaction. These publications identified separation, turbulent boundary layertrailing edge, and bluntness vortex shedding as the main sources of self-generated airfoil noise.By replacing the COTS rotor with an optimum hovering rotor design, self-generated broadbandnoise was reduced for both hover and forward flight conditions for isolated rotor runs. However,the optimum rotors only reduced noise levels for full-vehicle hover conditions, and had little tono reduction in full-vehicle forward flight conditions.


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    Titel :

    Aeroacoustic Testing of UAS-Scale Rotors for a Quadcopter in Hover and Forward Flight


    Beteiligte:

    Kongress:

    28th AIAA/CEAS Aeroacoustics Conference ; 2022 ; Southampton, GB


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Aeroacoustic Testing of UAS-Scale Rotors for a Quadcopter in Hover and Forward Flight

    N. A. Pettingill / N. S. Zawodny / C. S. Thurman | NTIS | 2022


    Aeroacoustic Testing of UAS-Scale Rotors for a Quadcopter in Hover and Forward Flight

    Pettingill, Nicole A. / Zawodny, Nikolas S. / Thurman, Christopher S. | AIAA | 2022


    High Fidelity Aerodynamic and Aeroacoustic Simulations of Multicopter Rotors with Anhedral During Hover and Forward Flight

    Muth, M. / Kessler, M. / Kramer, E. | British Library Conference Proceedings | 2023


    Computational aeroacoustic study of co-rotating rotors in hover

    Grande, Edoardo / Shubham / Avallone, Francesco et al. | Elsevier | 2024

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