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Prediction and reduction of internal blade-passing frequency noise of the centrifugal fan in a refrigerator / Seungyub Lee in International journal of refrigeration, Vol. 33 N° 6 (Septembre 2010) 

Public ISBD [article]  in International journal of refrigeration > Vol. 33 N° 6 (Septembre 2010) . - pp. 1129-1141 Titre : Prediction and reduction of internal blade-passing frequency noise of the centrifugal fan in a refrigerator Titre original : Prévision et diminution du bruit associé á la fréquence des passages des aubes du ventilateur axial d'un réfrigérateur Type de document : texte imprimé Auteurs : Seungyub Lee, Auteur ; Seung Heo, Auteur ; Cheolung Cheong, Auteur Année de publication : 2010 Article en page(s) : pp. 1129-1141 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Domestic  refrigerator  Experiment  Measurement  Noise  Fan  Modelling Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The internal blade-passing frequency (BPF) noise of a centrifugal fan in a household refrigerator is computed using a hybrid method. The unsteady flow field of the centrifugal fan in a duct is predicted by solving the incompressible Reynolds-averaged Navier–Stokes equations with conventional computational fluid dynamics techniques. The principal sources of noise are then extracted from the predicted flow field through the acoustic analogy. Finally, the internal BPF noise is predicted using the modeled sources in combination with the boundary element method. A parametric study using this hybrid technique shows that the BPF noise levels predicted for various non-dimensional cutoff distances closely follow the experimental data. Based on this result, a low-noise design for the centrifugal fan is proposed. A BPF noise reduction of approximately 3 dB is achieved in comparison with the original model, which is in good agreement with the prediction using the hybrid techniques. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000526 [article] Prediction and reduction of internal blade-passing frequency noise of the centrifugal fan in a refrigerator = Prévision et diminution du bruit associé á la fréquence des passages des aubes du ventilateur axial d'un réfrigérateur [texte imprimé] / Seungyub Lee, Auteur ; Seung Heo, Auteur ; Cheolung Cheong, Auteur . - 2010 . - pp. 1129-1141. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 6 (Septembre 2010) . - pp. 1129-1141 Mots-clés : Domestic  refrigerator  Experiment  Measurement  Noise  Fan  Modelling Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The internal blade-passing frequency (BPF) noise of a centrifugal fan in a household refrigerator is computed using a hybrid method. The unsteady flow field of the centrifugal fan in a duct is predicted by solving the incompressible Reynolds-averaged Navier–Stokes equations with conventional computational fluid dynamics techniques. The principal sources of noise are then extracted from the predicted flow field through the acoustic analogy. Finally, the internal BPF noise is predicted using the modeled sources in combination with the boundary element method. A parametric study using this hybrid technique shows that the BPF noise levels predicted for various non-dimensional cutoff distances closely follow the experimental data. Based on this result, a low-noise design for the centrifugal fan is proposed. A BPF noise reduction of approximately 3 dB is achieved in comparison with the original model, which is in good agreement with the prediction using the hybrid techniques. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710000526