Experimental validation of a model of fan trailing-edge noise (paper published in the Noise Control Engineering Journal - July-August 2009)

Résumé et principaux résultats

Cet article, publié dans le numéro de Juillet-Août 2009 du Noise Control Engineering Journal, présente une validation expérimentale d'un modèle de bruit de bord de fuite d'un ventilateur hélicoïde à deux pales sans virole.

Title : Experimental validation of a model of fan trailing-edge noise (paper published in the Noise Control Engineering Journal, July-August 2009)

Abstract:
This paper presents results of a research program that aims at predicting fan blade trailing-edge noise. The prediction is made using an analytical model deduced from an extended Amiet's formulation. The model is applied on a two-blade 800-mm axial flow fan without casing. The input data to the model, which are the spectrum and spanwise correlation length scale of the wall pressure fluctuations on the blade suction side close to the trailing edge, are measured. A comparison of the measured and predicted far-field sound pressure spectra for two blade pitch angles shows the validity of the model. To apply this prediction on other fans it appears advisable to try to deduce the spectra of the wall pressure fluctuations on the blade suction side from a semi-empirical model using flow simulation. This could avoid complicated and expensive measurement with pressure transducers flush-mounted on the blades. Suggestions are made in the last section of this paper to obtain this information from an approach that must be validated.

Commissions

Ventilateurs

Thème

Ventilateurs

Mots-clés

Acoustique, Aérodynamique des ventilateurs, Modélisation, Ventilateurs, Ventilateurs hélicoïdes

Auteurs

GUEDEL Alain, PERRIN Gérald