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AuthorSalehi, Mohammad
AuthorIdem, Stephen
AuthorSleiti, Ahmad
Available date2020-10-13T11:00:38Z
Publication Date2017
Publication NameScience and Technology for the Built Environment
ISSN23744731
URIhttp://dx.doi.org/10.1080/23744731.2016.1268904
URIhttp://hdl.handle.net/10576/16432
AbstractAn experimental program was implemented to study pressure losses in HVAC duct systems associated with 305 mm (12 in.) diameter close-coupled round five-gore elbows. The goal of this program was to experimentally verify a computational fluid dynamics model to accurately predict pressure losses in order to design duct systems more effectively. The results of this study showed that the loss coefficient increased as a function of separation distance between the elbows in a Z-configuration and decreased in a U-configuration. For both 305 mm (12 in.) and 203 mm (8 in.) diameter elbows, power law expressions correlating the combination loss coefficient data as a function of intermediate length for close-coupled elbows arranged in a Z-configuration or a U-configuration were presented. Computational fluid dynamics modeling with enhanced wall treatment using the k-ϵ method was generally able to correctly predict elbow loss coefficients with an error of less than 15%.
Languageen
PublisherTaylor and Francis Inc.
TitleExperimental determination and computational fluid dynamics predictions of pressure loss in close-coupled elbows (RP-1682)
TypeArticle
Pagination1132-1141
Issue Number7
Volume Number23


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