Publikations Einzelansicht
Konferenz
| Titel: | Ignition of dust-air atmospheres by ultrasonic waves |
|---|---|
| Autor(en): | L. H. Simon, V. Wilkens, T. Fedtke und M. Beyer |
| Jahr: | 2012 |
| Konferenz Name: | International Symposium of Hazard, Prevention and Mitigation of Industrial Explosions |
| Krakau | |
| Konferenz Datum: | 22.07.-27.07.2012 |
| Zusammenfassung: | This paper shows the results of our investigations on the ignition source ultrasound in dust-air atmospheres. Ultrasound is, on the one hand, considered to be an ignition source (EN 1127-1:2007). On the other hand, though, it is used for various applications in gases and air, such as level measurement, dust agglomeration (De Sarabia et al. 2000), particle size fractionation (Budwig et al. 2010) or potentially for the production of powder coatings (Hemsel et al. 2005), and no explosion accidents have yet been reported. Our research now shows that it is indeed possible to ignite dust-air mixtures in ultrasound fields under certain conditions. We conducted our experiments in an ultrasound standing-wave field and used maize starch, calcium stearate and sulfur dust. For ignitions, an absorbing target was needed to convert the acoustic energy into heat. From theoretical estimations and experiments critical conditions that provoke ultrasonically triggered explosions are identified. |
Kontakt
Dr. Michael Beyer | ||
| Sekretariat | Carola Lotz-Förster Tel.: 0531-592-3701 Fax: 0531-592-693701 E-Mail: Carola Lotz-Förster | |
| Anschrift | Physikalisch-Technische Bundesanstalt Arbeitsgruppe 3.73 Bundesallee 100 38116 Braunschweig |