Documents disponibles écrits par cet auteur

Development of low-noise centrifugal fans for a refrigerator using inclined S-shaped trailing edge / Seung Heo in International journal of refrigeration, Vol. 34 N° 8 (Décembre 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 2076–2091 Titre : Development of low-noise centrifugal fans for a refrigerator using inclined S-shaped trailing edge Titre original : Développement de ventilateurs centrifuges peu sonores pour un réfrigérateur à l’aide de la bordure de traînée inclinée en forme de S Type de document : texte imprimé Auteurs : Seung Heo, Auteur ; Cheolung Cheong, Auteur ; Tae-Hoon Kim, Auteur Année de publication : 2012 Article en page(s) : pp. 2076–2091 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Household  refrigerator  Centrifugal  fan  Noise  Acoustics Résumé : Low-noise centrifugal fans are developed by modifying the linear trailing edge lines of the fan blades into inclined S-shaped lines. The noise reductions achieved by using the inclined S-shaped trailing edges in the existing fans are confirmed by comparing the predicted BPF noise components of the developed fans with those of the existing fan. In addition, the turbulent kinetic energy of the fluid for the inclined S-shaped fans is predicted to be less than that for the existing fan. Finally, experiments using four prototype fans show that the levels of broadband noise from the newly developed fans are less than those of noise from existing fans. An additional experiment performed by using a selected low-noise fan installed in a household refrigerator show that the overall noise from the new fan is reduced by approximately 2.2 dB in comparison with that from the existing fan in the refrigerator. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001733 [article] Development of low-noise centrifugal fans for a refrigerator using inclined S-shaped trailing edge = Développement de ventilateurs centrifuges peu sonores pour un réfrigérateur à l’aide de la bordure de traînée inclinée en forme de S [texte imprimé] / Seung Heo, Auteur ; Cheolung Cheong, Auteur ; Tae-Hoon Kim, Auteur . - 2012 . - pp. 2076–2091. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 2076–2091 Mots-clés : Household  refrigerator  Centrifugal  fan  Noise  Acoustics Résumé : Low-noise centrifugal fans are developed by modifying the linear trailing edge lines of the fan blades into inclined S-shaped lines. The noise reductions achieved by using the inclined S-shaped trailing edges in the existing fans are confirmed by comparing the predicted BPF noise components of the developed fans with those of the existing fan. In addition, the turbulent kinetic energy of the fluid for the inclined S-shaped fans is predicted to be less than that for the existing fan. Finally, experiments using four prototype fans show that the levels of broadband noise from the newly developed fans are less than those of noise from existing fans. An additional experiment performed by using a selected low-noise fan installed in a household refrigerator show that the overall noise from the new fan is reduced by approximately 2.2 dB in comparison with that from the existing fan in the refrigerator. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001733

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