Combustion characteristics of pure aluminum and aluminum alloys powders |
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| Institution: | 1. College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China;2. Key Laboratory of Dual Dielectric Power Technology, Hebei Hanguang Industry Co. Ltd., Handan 056017, China;1. Technical University of Ostrava (VSB-TUO), Faculty of Safety Engineering, Lumírova 630/13, 700 30 Ostrava-Vý?kovice, Czech Republic;2. Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, D-12205, Berlin, Germany;3. Physikalisch Technische Bundesanstalt (PTB), Bundesallee 100, 38116, Braunschweig, Germany;1. Univ. Orléans PRISME EA 4229, 63 Avenue de Lattre de Tassigny, 18020 Bourges, France;2. CETIM CERTEC, 9 Bvd Lahitolle, 18000 Bourges, France |
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| Abstract: | In this work, the explosion and combustion characteristics of aluminum and some aluminum alloys AlSi7Mg0.6, AlSi10Mg, AlMg5 under powders conditioning were studied. The idea was to compare the combustion of pure aluminum and aluminum alloys. The Minimum Ignition Energy (MIE) and explosion severity ΔPmax and (dP/dt)max which represents the dust explosion parameters were measured for all powders using Hartman tube and 20 L spherical bomb. The particles temperature and flame temperature were determined by using IR pyrometer and spectroscopy respectively. The results showed that pure aluminum was more sensitive and severe than its alloys. MIE were: 4 mJ for pure aluminum, 13–23 mJ for aluminum alloys. For severity parameters, the overpressure ΔPmax were around 7–8 bars with maximum rate of pressure rise at 1170 bar/s for aluminum and 5–7 bars with 250–360 bar/s for alloys. However, it has been observed that flame temperatures were similar for aluminum and alloys and vary around 2800–3300 K as a function of concentration. |
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| Keywords: | Dust explosion Aluminum Aluminum alloys Temperatures Overpressure |
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