Reduction of fluid forces acting on a square prism using a planar jet

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dc.contributor.authorAkansu, Yahya Erkan
dc.contributor.authorFirat, Erhan
dc.contributor.authorHacialiogullari, Mustafa
dc.date.accessioned2024-11-07T13:31:42Z
dc.date.available2024-11-07T13:31:42Z
dc.date.issued2017
dc.departmentNiğde Ömer Halisdemir Üniversitesi
dc.description.abstractThis experimental study focused on the concurrent minimization of the mean and fluctuating forces acting on a square prism in crossflow by creating a continuous jet through a narrow spanwise slot in it. For this purpose, three different predetermined injection surfaces (i.e., front, top, and rear) were individually studied for the injection ratios (IR) of 0, 1, 1.5, 2, 2.5, and 3 at a Reynolds number (Re) of 8000. The results showed that the rear jet is the optimum injection surface. For the rear jet configuration, the optimum IR is 1.5 in terms of mean total drag coefficient reduction, < C-DT >. In this case, the reductions in the < C-DT > and the level of root mean square (RMS) of fluctuating pressure coefficient (C-p (RMs)) on the side surfaces are about 29.7% and 68%, respectively. However, the maximum reduction in the Cp (RMS) level on the side surfaces occurred at IR = 2. In this case, the reductions in the < C-DT > and the level of C-p (RMS) on the side surfaces are about 27.5% and 88%, respectively. The underlying mechanism of force reduction was also demonstrated. Various flow patterns were identified with respect to IR at incidence angle (alpha) of 0 degrees. It was also proved that, at relatively small angles of incidence, from alpha = 0 degrees to 20 degrees, the active flow control method is still effective in reducing < C-DT > and in suppressing the fluctuating side forces, which is indicative of periodic vortex shedding from either side of the square prism. (C) 2017 Elsevier Inc. All rights reserved.
dc.description.sponsorshipScientific and Technological Research Council of Turkey [105M241]
dc.description.sponsorshipThe authors would like to acknowledge the financial support of the Scientific and Technological Research Council of Turkey under the contract number 105M241.
dc.identifier.doi10.1016/j.expthermflusci.2017.03.031
dc.identifier.endpage22
dc.identifier.issn0894-1777
dc.identifier.issn1879-2286
dc.identifier.scopus2-s2.0-85017101074
dc.identifier.scopusqualityQ1
dc.identifier.startpage11
dc.identifier.urihttps://doi.org/10.1016/j.expthermflusci.2017.03.031
dc.identifier.urihttps://hdl.handle.net/11480/14989
dc.identifier.volume86
dc.identifier.wosWOS:000401883900002
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science 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_20241106
dc.subjectActive flow control
dc.subjectJet injection
dc.subjectDrag reduction
dc.subjectSquare prism
dc.subjectAngle of incidence
dc.titleReduction of fluid forces acting on a square prism using a planar jet
dc.typeArticle

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