Παρακαλώ χρησιμοποιήστε αυτό το αναγνωριστικό για να παραπέμψετε ή να δημιουργήσετε σύνδεσμο προς αυτό το τεκμήριο:
https://hdl.handle.net/123456789/1049| Τύπος: | Άρθρο σε επιστημονικό περιοδικό |
| Τίτλος: | Vapor cloud explosions in various types of confined environments: CFD analysis and model validation |
| Συγγραφέας: | [EL] Μομφεράτος Γεώργιος[EN] Momferatos, Georgios [EL] Γιαννίση, Στυλιανή[EN] Giannissi, Styliani [EL] Τόλιας, Ηλίας[EN] Tolias, Ilias [EL] Βενετσάνος, Αλέξανδρος[EN] Benetsanos, Alexandros [EL] Βλυσιδης, Ανέστης[EN] Vlyssides, Anestis [EL] Μαρκάτος, Νίκος[EN] Markatos, N. |
| Ημερομηνία: | 25/11/2021 |
| Περίληψη: | In the current work, three different types of vapor cloud explosion experiments are simulated. The purpose of the simulations is twofold: firstly, to evaluate a recently developed CFD model and secondly to analyze the involved phenomena with the help of the simulation results. The proposed model, which has been implemented in the ADREA-HF CFD code, utilizes the RANS method using the Kato and Launder modification of k-e model. Combustion is modelled by taking into account the main mechanisms that contribute to the phenomenon such as chemistry, turbulence generated from the obstacles in front of the flame front, flame instabilities and turbulence generated by the flame-front itself. The CFD model is evaluated against different types of explosions in different geometries and with various fuels. Uniform premixed fuel-air mixture is considered in all cases. A large scale vented deflagration experiment in a 10 m length enclosure is firstly simulated using methane as fuel. The external explosion effect is apparent in this case. Then, a hydrogen deflagration experiment in a 78.5 m tunnel is simulated. Four mock-up cars are placed in the premixed region. Finally, propane and methane explosions inside a 1.5 m tube with obstacles and intense turbulence are simulated. Two different obstacle configurations are studied. The model predicts the overpressure values satisfactorily in all the examined cases. The factors that contribute to the pressure rise in each stage of each experiment are discussed based on the simulation results. |
| Γλώσσα: | Αγγλικά |
| Σελίδες: | 12 |
| DOI: | 10.1016/j.jlp.2021.104681 |
| EISSN: | 1873-3352 |
| Θεματική κατηγορία: | [EL] Μηχανική, γενικά[EN] Engineering, general |
| Λέξεις-κλειδιά: | computational fluid dynamics; combustion; safety; Deflagration; Confined explosion; Modelling; Premixed combustion |
| Κάτοχος πνευματικών δικαιωμάτων: | © 2021 Elsevier Ltd. All rights reserved. |
| Ηλεκτρονική διεύθυνση του τεκμηρίου στον εκδότη: | https://www.sciencedirect.com/science/article/pii/S0950423021002874 |
| Ηλεκτρονική διεύθυνση περιοδικού: | https://www.sciencedirect.com/journal/journal-of-loss-prevention-in-the-process-industries |
| Τίτλος πηγής δημοσίευσης: | Journal of Loss Prevention in the Process Industries |
| Τόμος: | 75 |
| Σελίδες τεκμηρίου (στην πηγή): | Article no 104681 |
| Σημειώσεις: | This research is co-financed by Greece and the European Union (European Social Fund-ESF) through the Operational Programme « Human Resources Development, Education and Lifelong Learning 2014–2020» in the context of the project “Development of high-accuracy CFD models for consequence analysis in dispersion and combustion of vapor fuels” (MIS 5047820). |
| Εμφανίζεται στις συλλογές: | Ερευνητικές ομάδες |
Αρχεία σε αυτό το τεκμήριο:
Το πλήρες κείμενο αυτού του τεκμηρίου δεν διατίθεται προς το παρόν από το αποθετήριο