Aeroacoustics of an axial ducted low Mach-number stage: numerical and experimental investigation - Archive ouverte HAL Access content directly
Conference Papers Year : 2017

Aeroacoustics of an axial ducted low Mach-number stage: numerical and experimental investigation

Abstract

This paper presents an experimental and numerical investigation of a ducted low-speed axial fan. The stator row is heterogeneous with 3 thickened vanes expected to have a non-negligible impact on the radiated noise. A good agreement for pressure ratio / mass flow rate characteristics is obtained between numerical and experimental results up to the onset of rotating stall. Hot-wire velocity profiles at the inlet assessed the effectiveness of a turbulence control screen added to prevent from inflow distortions. Induct acoustic measurements allowed a detailed description from wall-pressure spectra up to modal decompositions upstream and downstream of the fan. Acoustic modes were identified at the first two blade passing frequencies, which should be cut-off with a homogeneous stator row.
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Dates and versions

hal-02407230 , version 1 (12-12-2019)

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Miguel Pestana, Antonio A. Pereira, Edouard Salze, Johan Thisse, Marlène Sanjose, et al.. Aeroacoustics of an axial ducted low Mach-number stage: numerical and experimental investigation. 23rd AIAA/CEAS Aeroacoustics Conference, Jun 2017, Denver, United States. ⟨10.2514/6.2017-3215⟩. ⟨hal-02407230⟩
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