Aeroacoustic analysis of the tonal noise of a large-scale radial blower

Aurélien Marsan (1) , Stéphane Moreau (1)

1 UdeS - Département de génie mécanique [Sherbrooke]

Large-scale radial blowers are widely used in factories and are one of the main sources of noise. The present study aims at identifying the noise generation mechanisms in such a radial blower in order to suggest simple modifications that could be made in order to reduce the noise. The flow in a representative large-scale radial blower is investigated thanks to unsteady RANS numerical simulations. The radiated noise is calculated thanks to an inhouse propagation code based on the Ffowcs Williams–Hawkings analogy, SherFWH. The results highlight the main noise generation mechanisms, in particular the interaction between the rotating blades and the tongue, and the interaction between the rotating blades and the trapdoors located on the volute sidewall. Some modifications of the geometry are suggested.

Mots clés: large-scale radial blower; aero-acoustic; unsteady RANS; acoustic analogy

Domaines: Mécanique [physics]

Aurélien Marsan, Stéphane Moreau. Aeroacoustic analysis of the tonal noise of a large-scale radial blower. 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Apr 2016, Honolulu, United States. ⟨hal-01887475⟩