Simulation of the flow field around buildings using a free-wake vortex method

Παπαρίζου, Ιωάννα Χριστίνα; Paparizou, Ioanna Christina

dc.contributor.author	Παπαρίζου, Ιωάννα Χριστίνα	el
dc.contributor.author	Paparizou, Ioanna Christina	en
dc.date.accessioned	2019-07-24T08:47:59Z
dc.date.available	2019-07-24T08:47:59Z
dc.date.issued	2019-07-24
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/49139
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.16416
dc.rights	Default License
dc.subject	Αεροδυναμική	el
dc.subject	Αποκολλήσεις	el
dc.subject	Oμόρρους	el
dc.subject	Mη συνεκτική	el
dc.subject	Mεθόδος στροβιλισμού ελεύθερης ξυλείας	en
dc.subject	Inviscid	en
dc.subject	Bluff	en
dc.subject	Recirculation	en
dc.subject	Flow field	en
dc.subject	wake	en
dc.subject	Separation	en
dc.subject	Free-wake vortex method
dc.title	Simulation of the flow field around buildings using a free-wake vortex method	en
heal.type	bachelorThesis
heal.classification	Aerodynamics	en
heal.language	el
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2019-03-15
heal.abstract	Complex problems, such as the rotor flight in the vicinity of a building, demand an increased computation time when solved with the URANS method. The aim of this thesis is to construct a formulation based on the panel method (potential flow combined with a free-vortex model for the flow separation from the edges of the body) for the simple case of a building embedded in a free-stream flow. The desired outcome is a valid calculation of the pressure distribution along the building and not the generation of the exact flow field, since the viscous terms and turbulence prediction are neglected in this time-efficient approach. At first, the basic characteristics of wind-building interaction are briefly analysed in order to comprehend the differences between streamlined - bluff body aerodynamics (panel methods are widely applied in lifting surfaces). The challenge of this bluff geometry is the simulation of the flow separation with a free-vortex model. For the solution of the problem the direct formulation (Morino & Kuo) is applied and two alternative implementations of the Kutta condition are examined for the calculation of the circulation shed on the near wake combined with the imposition of the no-penetration condition at the collocation points of the body (constant potential distributions along each panel). The results are compared with experimental data and CFD simulations of the same model. For a valid calculation of the Cp the inviscid method constructed in this thesis can be applied at the complex rotor - bluff obstacle problem, in order to examine their aerodynamic interaction and obtain the induced loads in both bodies.	en
heal.advisorName	Ριζιώτης, Βασίλειος	el
heal.committeeMemberName	Βουτσινάς, Σπυρίδων	el
heal.committeeMemberName	Μπούρης, Δημήτηριος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Μηχανολόγων Μηχανικών. Τομέας Ρευστών. Εργαστήριο Αεροδυναμικής	el
heal.academicPublisherID	ntua
heal.numberOfPages	89 σ.	el
heal.fullTextAvailability	true