Advanced Air Mobility is a vision for a safe, accessible, and sustainable aviation system to transport people and cargo between places not served by traditional aviation. With this emerging transportation industry, there is motivation to characterize the noise of vehicles to determine their potential impacts on the community. An experimental testing campaign was conducted on a representative model of a small unmanned aircraft system in the NASA Langley Low Speed Aeroacoustic Wind Tunnel as a continuation of a previous testing campaign. The goals of the current test are to identify sources of interactional noise as well as to test custom-designed rotors and noise reduction devices. The tested noise reduction methods involve increasing the vertical distances between the rotors and the vehicle airframe as well as between the forward and aft rotor disk planes. These methods are intended to reduce rotor-airframe interaction noise in hover and fore-aft rotor wake ingestion noise in forward flight. A phased microphone array is also utilized to identify the locations of prominent noise generation for the different vehicle configurations in forward flight. Elevation of the rotors from the vehicle airframe yielded nearly 8 dBA overall noise reduction in forward flight, while yielding up to 4 dB reduction in overall tonal levels for one of the rotors in hover.


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    Titel :

    Identification and Reduction of Interactional Noise of a Quadcopter in Hover and Forward Flight Conditions


    Beteiligte:

    Kongress:

    51st International Congress and Exposition on Noise Control Engineering (Inter-noise 2022) ; 2022 ; Glasgow, GB


    Erscheinungsdatum :

    2022-08-21


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    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


    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

    Nicole A Pettingill / Nikolas S Zawodny / Christopher S Thurman | NTRS



    Computational Study on Rotor Interactional Effects for a Quadcopter in Edgewise Flight

    Misiorowski, Matthew / Gandhi, Farhan / Oberai, Assad A. | AIAA | 2019