| Zugriffsnummer | 44972 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Ignition by low energy electrical discharges - Interference of self-generated vortices with the hot gas kernel |
| Autor(in); Institution |
Kummer, Johann-Robert; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
Essmann, Stefan; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
Grosshans, Holger; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
Markus, Detlev; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
Maas, Ulrich; Karlsruher Institut für Technologie (KIT), Institut für Technische Thermodynamik, Karlsruhe, GERMANY
|
| Quelle/Jahr | Proceedings of the 13th International Symposium on Hazards, Prevention and Mitigation of Industrial Explosions (ISHPMIE 2020):(2020), 978 - 983 |
| Herausgeber(in) |
Physikalisch-Technische Bundesanstalt
|
| DOI | |
| Konferenzangaben | 13th International Symposium on Hazards, Prevention and Mitigation of Industrial Explosions, Virtual Conference, 27-31, July, 2020 |
| Freie Schlagworte | minimum ignition energy ; ignition process by electrical discharges ; flow effects |
| Zusammenfassung | Ignition by electrical discharges in explosive atmospheres represents a serious safety risk in certain industrial applications. A characteristic parameter is the minimum ignition energy (MIE). Near the MIE, chemical and physical processes including flow effects interfere with the successful transition to a self-sustaining flame, leading to a statistical nature of the ignition process for a given fuel. In this work, we use numerical investigations to determine particular flow effects interacting with physiochemical processes leading to the ignition of hydrogen/air and methane/air mixtures close to the respective MIE. The results show that the hot gas kernel formed by the electrical discharge is influenced by generated vortices. The use of higher energy impacts the intake of cool gas towards the hot gas kernel by vortices significantly in case of methane. This outcome stresses the influence of flow phenomena especially on the early phase of ignition by low-energy discharges. |
| Kostenfreier Zugang | Freier Zugang |
| Rechteinformation | CC BY-ND 4.0 ; Creative Commons Attribution NoDerivatives 4.0 License |
| Themenbereich der Metrologie | Physikalische Sicherheitstechnik, Explosionsschutz |
Zitierung
Kummer, J.-R., Essmann, S., Grosshans, H., Markus, D., & Maas, U. (2020). Ignition by low energy electrical discharges - Interference of self-generated vortices with the hot gas kernel. 13th International Symposium on Hazards, Prevention and Mitigation of Industrial Explosions, Virtual Conference, 27-31, July, 2020. https://doi.org/10.7795/810.20200724