A comparative study of separated boundary layer transition on a flat plate with a blunt/semi-circular leading edge

Hdl Handle:
http://hdl.handle.net/10545/620671
Title:
A comparative study of separated boundary layer transition on a flat plate with a blunt/semi-circular leading edge
Authors:
Yang, Zhiyin ( 0000-0002-6629-1360 )
Abstract:
Boundary layer may separate due to an adverse pressure gradient or due to flow geometry and when a laminar boundary layer separates the free shear layer formed is very unstable even at low Reynolds number, undergoing a transition process to turbulence. This paper presents a comparative numerical study of the transition process in a separated boundary layer induced by changes of curvature of the surface. The geometry is a flat plate with two different leading edges: a blunt and a semi-circular. One of the main purpose of the study is to identify how similar or how different the transition process is with two different leading edges. It is evident that for both cases (blunt and semi-circular leading edges) the primary two-dimensional instability originates from the free shear layer of the separation bubble via the Kelvin-Helmholtz mechanism. Three-dimensional motions develop under any small spanwise disturbances and similar coherent structures have been observed in both cases, strongly indicating that the whole transition process is very similar.
Affiliation:
University of Derby
Citation:
Yang, Zhiyin (2011) A comparative study of separated boundary layer transition on a flat plate with a blunt/semi-circular leading edge. In: Recent Researches in Mechanics. WSEAS press, pp. 191-195. ISBN 978-1-61804-020-6
Publisher:
World Scientific and Engineering Academy and Society (WSEAS)
Issue Date:
Jul-2011
URI:
http://hdl.handle.net/10545/620671
Additional Links:
http://www.wseas.us/books/2011/Corfu/CUTAFLUP.pdf; http://www.wseas.org/wseas/cms.action?id=2741
Type:
Book chapter
Language:
en
ISBN:
9781620000000
Appears in Collections:
Department of Mechanical Engineering & the Built Environment

Full metadata record

DC FieldValue Language
dc.contributor.authorYang, Zhiyinen
dc.date.accessioned2016-10-31T10:46:23Z-
dc.date.available2016-10-31T10:46:23Z-
dc.date.issued2011-07-
dc.identifier.citationYang, Zhiyin (2011) A comparative study of separated boundary layer transition on a flat plate with a blunt/semi-circular leading edge. In: Recent Researches in Mechanics. WSEAS press, pp. 191-195. ISBN 978-1-61804-020-6en
dc.identifier.isbn9781620000000-
dc.identifier.urihttp://hdl.handle.net/10545/620671-
dc.description.abstractBoundary layer may separate due to an adverse pressure gradient or due to flow geometry and when a laminar boundary layer separates the free shear layer formed is very unstable even at low Reynolds number, undergoing a transition process to turbulence. This paper presents a comparative numerical study of the transition process in a separated boundary layer induced by changes of curvature of the surface. The geometry is a flat plate with two different leading edges: a blunt and a semi-circular. One of the main purpose of the study is to identify how similar or how different the transition process is with two different leading edges. It is evident that for both cases (blunt and semi-circular leading edges) the primary two-dimensional instability originates from the free shear layer of the separation bubble via the Kelvin-Helmholtz mechanism. Three-dimensional motions develop under any small spanwise disturbances and similar coherent structures have been observed in both cases, strongly indicating that the whole transition process is very similar.en
dc.language.isoenen
dc.publisherWorld Scientific and Engineering Academy and Society (WSEAS)en
dc.relation.urlhttp://www.wseas.us/books/2011/Corfu/CUTAFLUP.pdfen
dc.relation.urlhttp://www.wseas.org/wseas/cms.action?id=2741en
dc.subjectSeparated boundary layeren
dc.subjectTransitionen
dc.subjectAeronautical engineeringen
dc.subjectLarge-eddy simulation (LES)en
dc.titleA comparative study of separated boundary layer transition on a flat plate with a blunt/semi-circular leading edgeen
dc.typeBook chapteren
dc.contributor.departmentUniversity of Derbyen
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