Installed jet noise source analysis by microphone array processing

Abstract : This paper presents the identification of jet noise sources carried out at ONERA in the framework of the European Project JERONIMO. A dedicated test campaign was conducted in the anechoic wind tunnel CEPRA19 for a UHBR dual-stream nozzle with and without wing model installed. Arrays of microphone were implemented in order to apply advanced processing for noise source identification. The analysis focused on the wing installation effects. Correlated monopoles model was used in order to identify the different noise sources radiation occurring in installed jet configurations. The results projected in far field have been assessed with the farfield measurement. The acoustic localization processing applied to the numerical simulation demonstrates a good agreement with the experiments. Tonal jet-flap interaction noise is also highlighted, showing strong correlation between source at bypass exit and flap trailing edge.
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Submitted on : Friday, August 2, 2019 - 10:37:49 AM
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Renaud Davy, Frédéric Mortain, Maxime Huet, Thomas Le Garrec. Installed jet noise source analysis by microphone array processing. 25th AIAA/CEAS Aeroacoustics Conference, May 2019, DELFT, Netherlands. ⟨hal-02262210⟩

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