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Article: Aerodynamic loading on a cylinder behind an airfoil

TitleAerodynamic loading on a cylinder behind an airfoil
Authors
Issue Date2005
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00348/index.htm
Citation
Experiments In Fluids, 2005, v. 38 n. 5, p. 588-593 How to Cite?
AbstractThe interaction between the wake of a rotor blade and a downstream cylinder holds the key to the understanding and control of electronic cooling fan noise. In this paper, the aerodynamic characteristics of a circular cylinder are experimentally studied in the presence of an upstream NACA 4412 airfoil for the cylinder-diameter-based Reynolds numbers of Re d =2,100-20,000, and the airfoil chord-length-based Reynolds numbers of Re c =14,700-140,000. Lift and drag fluctuations on the cylinder, and the longitudinal velocity fluctuations of the flow behind the cylinder were measured simultaneously using a load cell and two hot wires, respectively. Data analysis shows that unsteady forces on the cylinder increase significantly in the presence of the airfoil wake. The dependence of the forces on two parameters is investigated, that is, the lateral distance (T) between the airfoil and the cylinder, and the Reynolds number. The forces decline quickly as T increases. For Re c <60,000, the vortices shed from the upstream airfoil make a major contribution to the unsteady forces on the cylinder compared to the vortex shedding from the cylinder itself. For Re c >60,000, no vortices are generated from the airfoil, and the fluctuating forces on the cylinder are caused by its own vortex shedding. © Springer-Verlag 2005.
Persistent Identifierhttp://hdl.handle.net/10722/156761
ISSN
2015 Impact Factor: 1.57
2015 SCImago Journal Rankings: 1.088
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhang, HJen_US
dc.contributor.authorHuang, Len_US
dc.contributor.authorZhou, Yen_US
dc.date.accessioned2012-08-08T08:43:51Z-
dc.date.available2012-08-08T08:43:51Z-
dc.date.issued2005en_US
dc.identifier.citationExperiments In Fluids, 2005, v. 38 n. 5, p. 588-593en_US
dc.identifier.issn0723-4864en_US
dc.identifier.urihttp://hdl.handle.net/10722/156761-
dc.description.abstractThe interaction between the wake of a rotor blade and a downstream cylinder holds the key to the understanding and control of electronic cooling fan noise. In this paper, the aerodynamic characteristics of a circular cylinder are experimentally studied in the presence of an upstream NACA 4412 airfoil for the cylinder-diameter-based Reynolds numbers of Re d =2,100-20,000, and the airfoil chord-length-based Reynolds numbers of Re c =14,700-140,000. Lift and drag fluctuations on the cylinder, and the longitudinal velocity fluctuations of the flow behind the cylinder were measured simultaneously using a load cell and two hot wires, respectively. Data analysis shows that unsteady forces on the cylinder increase significantly in the presence of the airfoil wake. The dependence of the forces on two parameters is investigated, that is, the lateral distance (T) between the airfoil and the cylinder, and the Reynolds number. The forces decline quickly as T increases. For Re c <60,000, the vortices shed from the upstream airfoil make a major contribution to the unsteady forces on the cylinder compared to the vortex shedding from the cylinder itself. For Re c >60,000, no vortices are generated from the airfoil, and the fluctuating forces on the cylinder are caused by its own vortex shedding. © Springer-Verlag 2005.en_US
dc.languageengen_US
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00348/index.htmen_US
dc.relation.ispartofExperiments in Fluidsen_US
dc.titleAerodynamic loading on a cylinder behind an airfoilen_US
dc.typeArticleen_US
dc.identifier.emailHuang, L:lixi@hku.hken_US
dc.identifier.authorityHuang, L=rp00119en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1007/s00348-004-0915-yen_US
dc.identifier.scopuseid_2-s2.0-18744365189en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-18744365189&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume38en_US
dc.identifier.issue5en_US
dc.identifier.spage588en_US
dc.identifier.epage593en_US
dc.identifier.isiWOS:000229093800004-
dc.publisher.placeGermanyen_US
dc.identifier.scopusauthoridZhang, HJ=7409200178en_US
dc.identifier.scopusauthoridHuang, L=7404735514en_US
dc.identifier.scopusauthoridZhou, Y=7405367101en_US

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