EXPERIMENTAL AND NUMERICAL COMPARISONS OF THE AEROACOUSTICS IN A CORRUGATED PIPE FLOW

Gaëtan Galeron (1) , Pierre-Olivier Mattei (1) , Muriel Amielh (2) , Fabien Anselmet (2) , Daniel Mazzoni (1)

1 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
2 IRPHE - Institut de Recherche sur les Phénomènes Hors Equilibre

Our study is focused on the singing risers phenomenon which is encountered in corrugated channels under flow. Internal corrugations are responsible for flow instabilities that synchronize with longitudinal acoustic modes of the channel giving powerful pure tones. Experiments are performed in a specifically designed facility. Numerical simulations of the flow based on a lattice Boltzmann method (LBM) are faced to the experimental results. They aimed at investigating the ability of a LBM based simulation to predict the aeroacoustics of corrugated channels. Acoustic modes and turbulence in the corrugated channel are quite well predicted except the sound pressure levels that need better description of the acoustic boundary conditions at the open ends.

Domaines: Mécanique des fluides [physics.class-ph]; Acoustique [physics.class-ph]

Gaëtan Galeron, Pierre-Olivier Mattei, Muriel Amielh, Fabien Anselmet, Daniel Mazzoni. EXPERIMENTAL AND NUMERICAL COMPARISONS OF THE AEROACOUSTICS IN A CORRUGATED PIPE FLOW. 11th International conference on Flow-Induced Vibrations (FIV 2016), Jun 2016, La Haye, Netherlands. ⟨hal-01386460⟩