2020/09/30 by Tiemo Pedergnana, Claire Bourquard, Abel Faure-Beaulieu +1 · 14 citations
Engineering · Physics and Astronomy · #Aerodynamics and Acoustics in Jet Flows #Amplitude #Aperture (computer memory) #Calibration #Computational Fluid Dynamics and Aerodynamics #Flow (mathematics) #Fluid Dynamics and Turbulent Flows #Forcing (mathematics) #Harmonic #Nonlinear element #Nonlinear system #Turbulence #msc:76Q05 #physics.flu-dyn
paper · pdf · doi:10.1103/physrevfluids.6.023903
published in Physical Review Fluids 6(2) (American Physical Society) · 33 pages, 10 figures
openalex created_date 2020/09/21 · openalex publication_date 2021/02/25 · arxiv created 2021/09/17 · arxiv updated 2021/09/21 · openalex updated_date 2026/08/05
The response of a side branch aperture to harmonic forcing is a key element of the feedback loop describing flow-induced aeroacoustic instability in deep cavities. We derive and validate two physics-based models which, after calibration at a given condition, predict the influence of frequency, mean flow speed, and acoustic pressure amplitude on the response. Notably, these low-order models enable robust analytical amplitude predictions of self-sustained oscillations in deep cavities under turbulent grazing flow