Εκτίμηση επικινδυνότητας ατυχημάτων από έκλυση τοξικών ρύπων για διαφορετικά χαρακτηριστικά ροής του ανέμου σε δομημένο περιβάλλον

Παλάμπιγικ, Ανάργυρος

dc.contributor.advisor	VASILOPOULOS, KONSTANTINOS
dc.contributor.author	Παλάμπιγικ, Ανάργυρος
dc.date.accessioned	2024-01-29T18:14:03Z
dc.date.available	2024-01-29T18:14:03Z
dc.date.issued	2023-09-29
dc.identifier.uri	https://polynoe.lib.uniwa.gr/xmlui/handle/11400/5829
dc.identifier.uri	http://dx.doi.org/10.26265/polynoe-5666
dc.format.extent	97	el
dc.language.iso	el	el
dc.publisher	Πανεπιστήμιο Δυτικής Αττικής	el
dc.rights	Αναφορά Δημιουργού - Μη Εμπορική Χρήση - Παρόμοια Διανομή 4.0 Διεθνές	*
dc.rights	Attribution-NonCommercial-NoDerivatives 4.0 Διεθνές	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/	*
dc.subject	Urban street canyon	el
dc.subject	Liquid fossil fuels	el
dc.subject	Pollutant dispersion	el
dc.subject	Combustion	el
dc.subject	CFD	el
dc.subject	Turbulence	el
dc.subject	Αστική χαράδρα	el
dc.subject	Υπολογιστική ρευστοδυναμική	el
dc.subject	Τυρβώδης ροή	el
dc.subject	Εκτίμηση επικινδυνότητας	el
dc.subject	Διασπορά ρύπων	el
dc.title	Εκτίμηση επικινδυνότητας ατυχημάτων από έκλυση τοξικών ρύπων για διαφορετικά χαρακτηριστικά ροής του ανέμου σε δομημένο περιβάλλον	el
dc.title.alternative	Risk assessment of a toxic pollutants dispersion after an accidental release for different wind flow characteristics in a built environment	el
dc.type	Μεταπτυχιακή διπλωματική εργασία	el
dc.contributor.committee	Νίκας, Κωνσταντίνος-Στέφανος
dc.contributor.committee	Sarris, Ioannis
dc.contributor.faculty	Σχολή Μηχανικών	el
dc.contributor.department	Τμήμα Μηχανολόγων Μηχανικών	el
dc.contributor.master	Έρευνα στη Θερμορευστομηχανική	el
dc.description.abstracttranslated	Even in our days, the airflow patterns inside in urban areas presents an increased interest. Urban planners are trying to find ways to make cities safer places for citizens while increasing demand for new or existing areas. Based on these facts and considering the development of computational tools developed by engineers in the fields of fluid mechanics and fire mechanics, it is possible to predict the behavior of airflow patters during accidents in urban areas. In this current study, two different computational fluid dynamics techniques are combined to determine the structure of airflow within a street canyon. Initialy, Reynolds-Averaged Navier-Stokes (RANS) models were performed for various W/H ratios of a street canyon model, which are used for the Large Eddy Simulation (LES) method initialization. The numerical models were validated with a reduce scale model which was built and tested in a wind tunnel. HWA (Hot Wire Anemometer) techniques were used in order to define the initial boundary conditions of the kinetic energy and dissipation rate. Pressure measurements with pressure taps on the building’s surface are recorded, and the pressure coefficients are compared against the numerical simulations results. After the study of the airflow a risk assessment analysis was conducted. The examined accident referred to a natural gas pipe leakage at the center of the street canyon. A constant source of leakage and four different atmospheric boundary layer was studied. The flow and fire characteristics were defined for all different examined cases. The strong correlation between the flow phenomena and the thermodynamic state of the produced gases from the combustion kept under consideration. As a result, there was the influence from buoyancy forces in the airflow structure. The natural gas pool fire is transformed quickly into a fire jet creating a temperature distribution, which makes this kind of accidents more severe. Outcome of the risk assessment analysis was the distribution of the temperature field defining the fatal zones from the high temperatures inside in the street canyon.	el

Files in this item

Name:: Final_thesis_Palampigik_msrtf2 ...
Size:: 3.753Mb
Format:: PDF
Description:: Μεταπτυχιακή διπλωματική εργασία

View/Open

This item appears in the following Collection(s)

Μεταπτυχιακές διπλωματικές εργασίες - Έρευνα στη Θερμορευστομηχανική
Μεταπτυχιακές διπλωματικές εργασίες ΠΜΣ Έρευνα στη Θερμορευστομηχανική

Show simple item record

Except where otherwise noted, this item's license is described as
Αναφορά Δημιουργού - Μη Εμπορική Χρήση - Παρόμοια Διανομή 4.0 Διεθνές