| Zugriffsnummer | 46384 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Assessing ignitions of explosive gas mixtures by low-energetic electrical discharges using OH-LIF and 1D-simulations |
| Autor(in); Institution |
Kummer, Johann-Robert; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
Essmann, Stefan; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
Markus, Detlev; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
Großhans, Holger; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
Maas, Ulrich; Karlsruher Institut für Technologie (KIT), Institut für Technische Thermodynamik, Karlsruhe, GERMANY
|
| Quelle/Jahr | Combustion Science and Technology:(2021), 1 - 23 |
| ISSN | 0010-2202 (PRINT) ; 1563-521X (ONLINE) |
| DOI | |
| Verlag | Philadelphia, PA: Taylor & Francis |
| Freie Schlagworte | Spark ignition ; minimum ignition energy ; OH-LIF |
| Zusammenfassung | Spark ignition by low-energetic electrical discharges in combustible fuel/air mixtures is a significant safety risk in various industries. In the present paper, OH-LIF measurements and numerical simulations of the ignition and early flame propagation of hydrogen/air, propane/air and ethene/air mixtures are reported. The experiments, carried out at four energy levels close to the respective minimum ignition energy (MIE), show that higher energy input leads to a wider flame radius, which is in agreement with one-dimensional numerical simulations. Further, the evaluation of the radial OH distribution reveals the highly stochastic nature of this process if the introduced energy is near the respective MIE. By utilizing the combined methodical approach of experiments and simulations, the key factors impairing the experimental repeatability are identified. The numerical results indicate at lower energies a longer time delay between source time and ignition, during which loss processes and perturbations may lead to extinction. One important influencing factor is the three-dimensional flow induced by the discharge, effectively increasing the experimental scatter. The presented work facilitates a detailed view on the complex physiochemical mechanisms dominating ignitions of explosive gas mixtures by low-energetic electrical discharges. |
| Themenbereich der Metrologie | Physikalische Sicherheitstechnik, Explosionsschutz |
| Forschungsprojekt | internes Projekt |
Zitierung
Kummer, J.-R., Essmann, S., Markus, D., Großhans, H., & Maas, U. (2021). Assessing ignitions of explosive gas mixtures by low-energetic electrical discharges using OH-LIF and 1D-simulations. Combustion Science and Technology, 1–23. https://doi.org/10.1080/00102202.2021.1931153