Aeroacoustic design and optimisation of an all-electric ducted fan propulsion module for low-noise impact

Casagrande Hirono, F; Torija Martinez, A; Elliott, A; Taylor, J; Grimshaw, S; Lefas, D

Abstract

This paper discusses the aeroacoustic aspects of the design, construction and testing of an all-electric ducted fan propulsion module for future electric aircraft. An overview of the propulsor aerodynamic design is provided. Acoustic measurements made with a prototype sub-scale unit in an anechoic chamber are reported, and measurement results are presented for far-field spectra, tonal and broadband directivities at a range of rotational speeds. It is shown that broadband noise is the dominant contributor to the sub-scale unit noise. A psychoacoustic investigation of the measured far-field radiation is conducted using selected Sound Quality Metrics, and it is shown that both Zwicker's Psychoacoustic Annoyance and Loudness scale with rotational speed at all angles.

Citation

Casagrande Hirono, F., Torija Martinez, A., Elliott, A., Taylor, J., Grimshaw, S., & Lefas, D. (2022, June). Aeroacoustic design and optimisation of an all-electric ducted fan propulsion module for low-noise impact. Presented at 28th AIAA/CEAS Aeroacoustics 2022 Conference, Southampton, UK

• Presentation Conference Type: Other
• Conference Name: 28th AIAA/CEAS Aeroacoustics 2022 Conference
• Conference Location: Southampton, UK
• Start Date: Jun 14, 2022
• End Date: Jun 17, 2022
• Acceptance Date: Feb 23, 2022
• Publication Date: Jun 13, 2022
• Deposit Date: Jul 26, 2022
• DOI: https://doi.org/10.2514/6.2022-3034
• Publisher URL: https://arc.aiaa.org/doi/10.2514/6.2022-3034
• Additional Information: Event Type : Conference; Projects : InCEPTion