Prediction of Swirl Effects on Fan-OGV Interaction Tones

Adetifa, Oluwaseun E, Mcalpine, Alan and Namgoong, Howoong (2022) Prediction of Swirl Effects on Fan-OGV Interaction Tones. Proceedings of the 28th AIAA/CEAS Aeroacoustics Conference, Southampton, UK, , Southampton, United Kingdom. 14 - 17 Jun 2022. AIAA 2022-2942 . (doi:10.2514/6.2022-2942).

Record type: Conference or Workshop Item (Paper)

Abstract

Noise levels predicted for the fan-OGV interaction tones generated by modern high and ultra high bypass ratio aircraft engines are significantly changed when swirl in the interstage region is included in the modelling. An analytical prediction method is used to predict interstage interaction tonal noise levels for an annular duct with uniform flow or swirling flow. It is predicted that swirl effects alter the range of modes that are cut-on, and their corresponding sound power levels in the upstream direction. Results confirm that the inclusion of swirl effects in the modelling of fan-OGV interaction tones is important to improve the prediction of the sound power levels of the upstream propagating modes.

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Adetifa_etal_AIAA2022_pre-print_open_access - Author's Original

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Published date: 13 June 2022

Additional Information: Funding Information: The research was funded by Rolls–Royce plc and Innovate UK in the ACAPELLA and FANTASIA projects. The Publisher Copyright: © 2022, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

Venue - Dates: Proceedings of the 28th AIAA/CEAS Aeroacoustics Conference, Southampton, UK, , Southampton, United Kingdom, 2022-06-14 - 2022-06-17