Εφαρμογή μοντέλων μετάβασης σε τυρβώδη ροή σε ασυμπίεστο επιλύτη

Μαγουλάς, Αναστάσιος; Magoulas, Anastasios

dc.contributor.author	Μαγουλάς, Αναστάσιος	el
dc.contributor.author	Magoulas, Anastasios	en
dc.date.accessioned	2020-10-28T21:21:21Z
dc.date.available	2020-10-28T21:21:21Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/51649
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.19347
dc.rights	Default License
dc.subject	Fluid	en
dc.subject	CFD	en
dc.subject	Transition	en
dc.subject	MaPflow	en
dc.subject	Incompressible	en
dc.subject	Ρευστά	el
dc.subject	Ασυμπίεστο	el
dc.subject	Μετάβαση	el
dc.subject	Τυρβώδη	el
dc.subject	Υπολογιστική	el
dc.title	Εφαρμογή μοντέλων μετάβασης σε τυρβώδη ροή σε ασυμπίεστο επιλύτη	el
dc.title	Implementation of transition modelling on an incompressible solver	en
heal.type	bachelorThesis
heal.classification	Ρευστομηχανική	el
heal.classification	Fluid mechanics	en
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2020-10-09
heal.abstract	The aim of the present work was to asses the performance of the modelling of transition from laminar to turbulent flow. For this purpose an incompressible solver was utilized, where the velocity and pressure fields were linked with the aid of the Artificial Compressibility Method. From all the transition models available in the literature, the Langtry and Menter    Re model was selected, which is a two-equation model and belongs to the family of Local Correlation Based Transition Models. For validation purposes, simulations were performed on two dimensions for two airfoils typically used in the wind power generation industry, as well as a three-dimensional propeller. The results were then compared to experiments available in the literature in order to assess how well the solver captures the complicated phenomenon of transition. The simulation for the two-dimensional airfoils indicated that the results are in good agreement with the experimental ones only for small angles of attack, while in higher angles of attack, the effect of strong three dimensional phenomena lead to discrepancies between the results of the solver and the experimental ones. For the case of the three dimensional propeller, the solver managed to capture the correct slope for the curves on the Open Water Diagram, while a corresponding Fully Turbulent Solver failed to capture them.	en
heal.advisorName	Παπαδάκης, Γεώργιος	el
heal.committeeMemberName	Γρηγορόπουλος, Γρηγόρης	el
heal.committeeMemberName	Τριανταφύλλου, Γεώργιος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών. Τομέας Ναυτικής και Θαλάσσιας Υδροδυναμικής. Εργαστήριο Ναυτικής και Θαλάσσιας Υδροδυναμικής	el
heal.academicPublisherID	ntua
heal.numberOfPages	68 σ.	el
heal.fullTextAvailability	false