| Zugriffsnummer | 44538 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Ignition at plane and convex hot surfaces at different spatial orientation |
| Autor(in); Institution |
Chowhan, Sai Charan Singh; 3.7, Grundlagen des Explosionsschutzes, PTB-Braunschweig
Raval, Priyank; 3.7, Grundlagen des Explosionsschutzes, PTB-Braunschweig
Velagala, Subrahmanyeswara; Otto von Guericke University Magdeburg, Department of System Design and Plant Safety, GERMANY
Hau, Michael; 3.7, Grundlagen des Explosionsschutzes, PTB-Braunschweig
Großhans, Holger; 3.5, Explosionsschutz in der Energietechnik, PTB-Braunschweig
Beyer, Michael; 3.7, Grundlagen des Explosionsschutzes, PTB-Braunschweig
|
| Quelle/Jahr | 13th International Symposium on Hazards, Prevention and Mitigation of Industrial Explosions (ISHPMIE):(2020), 984 - 993 |
| Herausgeber(in) |
Physikalisch-Technische Bundesanstalt
|
| DOI | |
| Konferenzangaben | 13th International Symposium on Hazards, Prevention and Mitigation of Industrial Explosions ; ISHPMIE, Virtual Conference, 27-31, July, 2020 |
| Freie Schlagworte | ignition source ; ignition temperature ; hot surface |
| Zusammenfassung | Ignition temperatures of explosive gas-air mixtures at hot surfaces of equipment and process technology systems are usually above the safety characteristic auto ignition temperature (AIT). The actual ignition temperatures depend very much on the heat transfer and on the flow conditions at the hot surface. Without forced external flow, these in turn are very much determined by the shape and geometrical arrangement of the ignition source as well as the convective flow. The aim of the work is to investigate the development of the ignition at real hot surfaces in natural convection and to measure the specific ignition temperatures of the explosive mixtures by ignition sources in different spatial orientations. The influence of the orientation on critical hot spots in gas mixtures of carbon disulfide and diethyl ether are investigated in a cylindrical vessel with a heating body at the bottom. The vessel is rotated in steps of 45° to the top to analyse the ignition and the convective flow in different orientations. Temperature measurements at the heating body and in the free volume show the temporal evolution of the temperature distribution. The place of the ignition is recorded by a high-speed camera. We discuss the change of the onset, temperature and location of the ignition. The results are used as a basis for the validation of numerical simulations |
| Kostenfreier Zugang | Freier Zugang |
| Rechteinformation | CC BY-ND 4.0 ; Creative Commons Attribution NoDerivatives 4.0 License |
| Themenbereich der Metrologie | Physikalische Sicherheitstechnik, Explosionsschutz |
Zitierung
Chowhan, S. C. S., Raval, P., Velagala, S., Hau, M., Großhans, H., & Beyer, M. (2020). Ignition at plane and convex hot surfaces at different spatial orientation. 13th International Symposium on Hazards, Prevention and Mitigation of Industrial Explosions ; ISHPMIE, Virtual Conference, 27-31, July, 2020. https://doi.org/10.7795/810.20200724