Microphone phased-array and pole-mounted microphone data gathered during the NASA Acoustics Research Measurements flight tests were used to benchmark results from companion full-scale aeroacoustics simulations. Conducted with the lattice Boltzmann solver PowerFLOW®, the simulations predicted the acoustic behavior of various tested aircraft configurations. Emphasis was placed on those flown during the third flight test - a Fowler flap-equipped Gulfstream G-III with and without noise abatement technology on the main landing gear. Direct comparisons between experimental and synthetic microphone phasedarray data were achieved by applying the same processing and deconvolution technique to both sets of data. To extend the validation of the computations to the metric used for noise certification, the Effective Perceived Noise Level, a high-fidelity digital model of the nose landing gear, which was excluded from earlier computations, was developed and integrated into the G-III aircraft geometry. The acoustic study presented here demonstrates that the simulated beamform maps and corresponding integrated farfield spectra accurately predict the locations and strengths of the prominent airframe noise sources present on the G-III aircraft.


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    Titel :

    Measured and Simulated Acoustic Signature of a Full-Scale Aircraft with Airframe Noise Reduction Technology Installed


    Beteiligte:

    Kongress:

    2019 AIAA Aeroacoustics Conference ; 2019 ; Delft, Netherlands


    Erscheinungsdatum :

    2019-05-20


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Measured and Simulated Acoustic Signature of a Full-Scale Aircraft with Airframe Noise Reduction Technology Installed

    Khorrami, Mehdi R. / Ravetta, Patricio A. / Lockard, David P. et al. | AIAA | 2019


    MEASURED AND SIMULATED ACOUSTIC SIGNATURE OF A FULL-SCALE AIRCRAFT WITH AIRFRAME NOISE REDUCTION TECHNOLOGY INSTALLED

    Khorrami, Mehdi R. / Ravetta, Patricio A. / Lockard, David P. et al. | British Library Conference Proceedings | 2019


    Simulations of a Full-Scale Aircraft with Installed Airframe Noise Reduction Technologies

    Ferris, Ryan / Appelbaum, Jason / Khorrami, Mehdi R. | AIAA | 2018


    Simulations of a Full-Scale Aircraft with Installed Airframe Noise Reduction Technologies

    Ferris, Ryan J. / Appelbaum, Jason / Khorrami, Mehdi R. | NTRS | 2018


    Simulations of a Full-Scale Aircraft with Installed Airframe Noise Reduction Technologies (AIAA 2018-2974)

    Ferris, Ryan / Appelbaum, Jason / Khorrami, Mehdi R. | British Library Conference Proceedings | 2018