Determination of the Acoustic and Hydrodynamic Contributions to the Vibrational Response of an Air-Conveying Rectangular Duct - Archive ouverte HAL Accéder directement au contenu
Chapitre D'ouvrage Année : 2019

Determination of the Acoustic and Hydrodynamic Contributions to the Vibrational Response of an Air-Conveying Rectangular Duct

Florian Hugues
  • Fonction : Auteur
Emmanuel Perrey-Debain
  • Fonction : Auteur
Nicolas Dauchez
Nicolas Papaxanthos
  • Fonction : Auteur

Résumé

This paper focuses on the vibratory response of a rectangular duct of finite length excited by an internal turbulent flow. The wall pressure distribution is decomposed into a hydrodynamic and acoustic contribution. Two configurations are investigated: (i) a straight duct with no singularity, in which duct acoustic modes are excited by the TBL and (ii) a straight duct with a diaphragm inserted upstream generating a localized acoustic source. The acoustic contribution is either measured via cross-spectra-based methods or calculated using Computational Fluid Dynamics and aeroacoustic analogies. Semi-analytical predictions are compared with experimental results. It is concluded that in both scenarios, the acoustic contribution is largely dominant.
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Dates et versions

hal-03213538 , version 1 (30-04-2021)

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Florian Hugues, Emmanuel Perrey-Debain, Nicolas Dauchez, Nicolas Papaxanthos. Determination of the Acoustic and Hydrodynamic Contributions to the Vibrational Response of an Air-Conveying Rectangular Duct. Flinovia—Flow Induced Noise and Vibration Issues and Aspects-II, Springer International Publishing, pp.217-231, 2019, ⟨10.1007/978-3-319-76780-2_14⟩. ⟨hal-03213538⟩
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