Effects of rear slant angles on the flow characteristics of Ahmed body

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dc.contributor.authorTunay, Tural
dc.contributor.authorSahin, Besir
dc.contributor.authorOzbolat, Veli
dc.date.accessioned2025-01-06T17:30:10Z
dc.date.available2025-01-06T17:30:10Z
dc.date.issued2014
dc.description.abstractAhmed body is a simplified vehicle model which retains important features of real ground vehicles. Present study aims to investigate effects of rear slant angles (?=25°, 30° and 35°) on time-averaged and instantaneous flow characteristics downstream of the Ahmed body because angle of the rear slanted surface considerably affects the flow characteristics. The particle image velocimetry (PIV) technique is employed to measure the flow field in the symmetry plane z=0 downstream of the Ahmed body. Demonstration and detailed discussions of the flow features are provided using time-averaged velocity vectors, streamlines, vorticity and TKE contours. Three critical flow points are revealed in the wake downstream of the Ahmed body. Namely, they are focus point 1 (F1), focus point 2 (F2) and saddle point (S). Variations in slant angle ? cause shift in the locations of these critical flow points. Effects of change of slant angle ? on each critical flow point vary according to their locations in the wake. Instantaneous vorticity contours and spectral analysis of the velocity field are also provided. As a result of the spectral analysis, a single dominant frequency location is only detected for ?=25°, on the other hand two dominant frequency locations are detected for ?=30° and 35° in the wake. Mean stream-wise and vertical velocity components are compared with available data in the literature. Although there are some discrepancies between the present and previous results at certain locations in the flow field, general agreement between these results is reasonably good when taking the difference between Reynolds numbers of the two studies into account. © 2014 Elsevier Inc.
dc.description.sponsorshipCukurova University, (AAP20025)
dc.identifier.doi10.1016/j.expthermflusci.2014.04.016
dc.identifier.endpage176
dc.identifier.issn0894-1777
dc.identifier.scopus2-s2.0-84900833539
dc.identifier.scopusqualityQ1
dc.identifier.startpage165
dc.identifier.urihttps://doi.org/10.1016/j.expthermflusci.2014.04.016
dc.identifier.urihttps://hdl.handle.net/20.500.14669/1477
dc.identifier.volume57
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Inc.
dc.relation.ispartofExperimental Thermal and Fluid Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectAerodynamics
dc.subjectAhmed body
dc.subjectPIV
dc.subjectSeparation
dc.subjectWake
dc.titleEffects of rear slant angles on the flow characteristics of Ahmed body
dc.typeArticle

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