AIAA AVIATION 2023 Forum 2023
DOI: 10.2514/6.2023-3215
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Low-Frequency Intensity Modulation of High-Frequency Rotor Noise

Abstract: Acoustic spectra of rotor noise yield frequency-distributions of energy within pressure time series. However, they are unable to reveal phase-relations between different frequency components, while the latter play a role in low-frequency intensity modulation of higherfrequency rotor noise. Baars et al. (AIAA Paper 2021-0713) outlined a methodology to quantify inter-frequency modulation, which in the current work is applied to a comprehensive acoustic dataset of a rotor operating at low Reynolds number at advan… Show more

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