| Zugriffsnummer | 48436 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Simulation of the flow of an explosive atmosphere exposed to a hot surface |
| Autor(in); Institution |
Velagala, Subrahmanyeswara; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
Raval, Priyank; 3.7, Grundlagen des Explosionsschutzes, PTB-Braunschweig
Chowan, Sai Charan Singh; 3.7, Grundlagen des Explosionsschutzes, PTB-Braunschweig
Esmaeelzade, Ghazaleh; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
Beyer, Michael; 3.7, Grundlagen des Explosionsschutzes, PTB-Braunschweig
Grosshans, Holger; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
|
| Quelle/Jahr | Journal of Loss Prevention in the Process Industries: 73 (2021), 1 - 10 |
| Artikelnummer | 104610 |
| ISSN | 0950-4230 (PRINT) |
| DOI | |
| Verlag | Amsterdam: Elsevier |
| Freie Schlagworte | Flow simulation ; Thermal flow ; Explosive atmosphere ; Hot hemisphere ; Hot disc |
| Zusammenfassung | The accidental ignition of combustible atmospheres by hot surfaces is of great concern for chemical and process plant safety. In this paper, we present our research regarding the evolution of thermal plumes originating from hot hemispheres and discs. In particular, we focus on the effect of the orientation of the surface on the ignition process. The auto-ignition temperatures and ignition locations were studied experimentally. To get further insight, we conducted detailed numerical simulations and validated them with measurements. Three-dimensional simulations were performed on hot hemispheres and hot discs for different orientations ranging from 0° to 180°. The solver employs a transient, implicit scheme which is based on the coupled heat transfer and flow equations. The mesh in the vicinity of the hot surfaces is refined to resolve the steep temperature gradients and to capture the boundary layer separation. The influence of the orientation on critical hot spots in the gas mixture is analysed by examining the flow structures and the temperature evolution of the buoyancy-driven flow. Using the obtained results, we discuss the change of the onset and location of the ignition. |
| Förderinformationen (1) |
Förderername: Berufsgenossenschaft Rohstoffe und Chemische Industrie (BGRCI)
Förderer ID: 0000 0001 0469 3957 Förderer ID Typ: ISNI |
| Förderinformationen (2) |
Förderername: European Research Council (ERC)
Förderer ID: 0000 0000 8923 0953 Förderer ID Typ: ISNI Förderprogramm: PowFEct Förderungsnummer: 947606 |
Zitierung
Velagala, S., Raval, P., Chowan, S. C. S., Esmaeelzade, G., Beyer, M., & Grosshans, H. (2021). Simulation of the flow of an explosive atmosphere exposed to a hot surface. Journal of Loss Prevention in the Process Industries, 73, 1–10. https://doi.org/10.1016/j.jlp.2021.104610