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Viscous disk air flow displacement device (VDAFDD) / Jonathan M. Hilton in Transactions of the ASME . Journal of fluids engineering, Vol. 132 N° 10 (Octobre 2010) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 132 N° 10 (Octobre 2010) . - 08 p. Titre : Viscous disk air flow displacement device (VDAFDD) : development and performance Type de document : texte imprimé Auteurs : Jonathan M. Hilton, Auteur ; Phillip M. Ligrani, Auteur Année de publication : 2011 Article en page(s) : 08 p. Note générale : fluids engineering Langues : Anglais (eng) Mots-clés : pressure;  flow  (dynamics);  disks;  ducts Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The development and performance of a unique viscous disk air flow displacement device (or VDAFDD) for inducing airflow in confined spaces is described. The development is motivated by electronic cooling, where limitations on space are especially severe and the need exists to circulate air over or through the key components using a compact and efficient device. To induce air motion, array of disks are employed with their axis of rotation perpendicular to the air stream. Results from the most successful prototype, which was developed and tested, prototype 2, are presented for Reynolds numbers up to 671 to illustrate nominal behavior, as well as behavior as a number of different parameters are altered, including the magnitude of exit flow restriction, the air gap above the disks, and the number of disks employed to induce air motion. Also discussed are the effects of disk rotational speed, comparisons with theoretical predictions, and one earlier prototype whose performance is significantly less than that of prototype 2. DEWEY : 620.1 ISSN : 0098-2202 En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/Issue.aspx?issueID=27433 [...] [article] Viscous disk air flow displacement device (VDAFDD) : development and performance [texte imprimé] / Jonathan M. Hilton, Auteur ; Phillip M. Ligrani, Auteur . - 2011 . - 08 p. fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 132 N° 10 (Octobre 2010) . - 08 p. Mots-clés : pressure;  flow  (dynamics);  disks;  ducts Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The development and performance of a unique viscous disk air flow displacement device (or VDAFDD) for inducing airflow in confined spaces is described. The development is motivated by electronic cooling, where limitations on space are especially severe and the need exists to circulate air over or through the key components using a compact and efficient device. To induce air motion, array of disks are employed with their axis of rotation perpendicular to the air stream. Results from the most successful prototype, which was developed and tested, prototype 2, are presented for Reynolds numbers up to 671 to illustrate nominal behavior, as well as behavior as a number of different parameters are altered, including the magnitude of exit flow restriction, the air gap above the disks, and the number of disks employed to induce air motion. Also discussed are the effects of disk rotational speed, comparisons with theoretical predictions, and one earlier prototype whose performance is significantly less than that of prototype 2. DEWEY : 620.1 ISSN : 0098-2202 En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/Issue.aspx?issueID=27433 [...]