Implementation and assessment of low-reynolds turbulence models for airfoil flows on unstructured grids

dc.contributor.author	Κουμπογιάννης, Δημήτριος Γ.	el
dc.contributor.author	Γιαννάκογλου, Κυριάκος Χ.	el
dc.date.accessioned	2015-06-07T21:00:07Z
dc.date.available	2015-06-07T21:00:07Z
dc.date.issued	2015-06-08
dc.identifier.uri	http://hdl.handle.net/11400/15556
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://velos0.ltt.mech.ntua.gr/research/pdfs/3_056.pdf	en
dc.subject	Συντελεστής κατανομής
dc.subject	Δυνατότητες πρόβλεψης
dc.subject	Υποηχητικές ροές υψηλής ανύψωσης
dc.subject	Μηχανισμός μετάβασης
dc.subject	Μεταβατική μοντελοποίηση
dc.subject	Coefficient distribution
dc.subject	Predictive capabilities
dc.subject	Subsonic high-lift flows
dc.subject	Transition mechanism
dc.subject	Transition modelling
dc.title	Implementation and assessment of low-reynolds turbulence models for airfoil flows on unstructured grids	en
heal.type	conferenceItem
heal.classification	Μαθηματικά
heal.classification	Μηχανική
heal.classification	Mathematics
heal.classification	Engineering
heal.classificationURI	N/A-Μαθηματικά
heal.classificationURI	N/A-Μηχανική
heal.classificationURI	http://skos.um.es/unescothes/C02437
heal.classificationURI	http://skos.um.es/unescothes/C01363
heal.identifier.secondary	ISBN: 8489925704;978-848992570-0
heal.language	en
heal.access	campus
heal.recordProvider	Τεχνολογικό Εκπαιδευτικό Ίδρυμα Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Μηχανικών Ενεργειακής Τεχνολογίας Τ.Ε.	el
heal.publicationDate	2000-09-11
heal.bibliographicCitation	Koubogiannis, D.G. and Giannakoglou, K.C. (2000) Implementation and assessment of low-Reynolds turbulence models for airfoil flows on unstructured grids.European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2000. Barcelona, Spain	en
heal.abstract	Three low-Reynolds turbulence models are implemented in an unstructuredgrid, Navier-Stokes, finite-volume solver. These are the one-equation model of Spalart- Allmaras, the Shear-Stress-Transport k - ω model and a hybrid one/two-equation k - ε model. All of them are shown to be robust and compliant with unstructured grids. They are used to numerically predict the subsonic flow around two-dimensional high-lift configurations, namely the two-element NLR-7301 airfoil and the single-element A-airfoil, where turbulent separation occurs near the trailing edge at high incidence angles. Both global coefficient distributions (Cp, Cf , C l, Cd) and local boundary layer quantities or velocity profiles are compared with measured data. Due to the very stretched grid cells used close to solid boundaries, the definition of the finite-volumes (median-dual or containment circle-dual tesselation of the domain) is crucial for the quality of the results. Besides, the effect of including or not a transition mechanism into the turbulence model is investigated. The results from all models are satisfactory; the Spalart-Allmaras model performs slightly better than the other two models in terms of both predictive capability and numerical robustness.	en
heal.sponsor	Commission of European Communities (EC),Ministerio de Ciencia y Tecnologia,Generalitat de Catalunya, Comissio Interdepartamental,de Recerca i Innovacio Tecnologica (CIRIT),Autoritat Portuaria de Barcelona	en
heal.fullTextAvailability	true
heal.conferenceName	European Congress on Computational Methods in Applied Sciences and Engineering, ECCOMAS 2000	en
heal.conferenceItemType	full paper