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New ignition source 'exploding wire' for the determination of explosion characteristics of combustible dusts in the 20-L sphere

  • According to international standards several safety characteristics of dusts are determined in the 20-L sphere (also known as SIWEK-Chamber). Dust cloud ignition is carried out using pyrotechnical igniters. Due to various disadvantages of pyrotechnical igniters the need for alternative ignition sources arises again and again. An alternative ignition source could be the so-called 'exploding wire' or 'fuse wire'. The paper presents test results of a comparative study between both ignition sources for the determination of the safety characteristics Maximum Explosion Pressure and Maximum Rate of Explosion Pressure Rise of selected dusts in the 20-L sphere. In addition the propagation of flame and electrical arc was analysed by high speed camera recordings. Tests in a windowed autoclave were performed to get information on the influence of turbulence during ignition on the shape of the generated flame (electrical arc) and its propagation. Turbulence measurements with a LDA system in theAccording to international standards several safety characteristics of dusts are determined in the 20-L sphere (also known as SIWEK-Chamber). Dust cloud ignition is carried out using pyrotechnical igniters. Due to various disadvantages of pyrotechnical igniters the need for alternative ignition sources arises again and again. An alternative ignition source could be the so-called 'exploding wire' or 'fuse wire'. The paper presents test results of a comparative study between both ignition sources for the determination of the safety characteristics Maximum Explosion Pressure and Maximum Rate of Explosion Pressure Rise of selected dusts in the 20-L sphere. In addition the propagation of flame and electrical arc was analysed by high speed camera recordings. Tests in a windowed autoclave were performed to get information on the influence of turbulence during ignition on the shape of the generated flame (electrical arc) and its propagation. Turbulence measurements with a LDA system in the windowed autoclave as well as in the 20-L sphere allowed investigation if the ignition sources led to an additional turbulence increase at the moment of ignition in comparison to tests without ignition.zeige mehrzeige weniger

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Metadaten
Autor*innen:Marc Scheid, Alexander Klippel, Rico TschirschwitzORCiD, Volkmar Schröder, Stefan Zirker, Christian Kusche
Persönliche Herausgeber*innen:G. Makhviladze, V. Molkov, D. Bradley, P. Sunderland, F. Tamanini
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):ISFEH7 - 7th International seminar on fire & explosion hazards (Proceedings)
Jahr der Erstveröffentlichung:2013
Herausgeber (Institution):University of Maryland
Verlag:Research publishing
Erste Seite:810
Letzte Seite:819
Freie Schlagwörter:Alternative Zündquelle; Dust explosion testing; Explodierender Draht; Exploding wire; Explosion characteristics; Ignition source; Sicherheitstechnische Kenngrößen Staub; Staubexplosionsschutz
Veranstaltung:ISFEH7 - 7th International seminar on fire & explosion hazards
Veranstaltungsort:Providence, RI, USA
Beginndatum der Veranstaltung:05.05.2013
Enddatum der Veranstaltung:10.05.2013
DOI:10.3850/978-981-07-5936-0_13-04
ISBN:978-981-07-5936-0
ISBN:978-981-07-5940-7
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Nein
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