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Synchronized smoldering combustion
RISE - Research Institutes of Sweden, Säkerhet och transport, Fire Research Norge. Western Norway University of Applied Sciences, Norway; Otto von Guericke University Magdeburg, Germany.ORCID-id: 0000-0003-0979-2369
Western Norway University of Applied Sciences, Norway.ORCID-id: 0000-0002-3119-9900
Western Norway University of Applied Sciences, Norway.ORCID-id: 0000-0002-4805-9007
2018 (Engelska)Ingår i: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 121, nr 5, s. 50002-p1-50002-p2Artikel i tidskrift, Letter (Refereegranskat) Published
Abstract [en]

Synchronized, pulsating temperatures are observed experimentally in smoldering fires.The entire sample volume (1.8 l) participates in the pulsations (pulse period 2–4 h). The synchronylasts up to 25 h and is followed by a spontaneous transition to either disordered combustion orself-extinguishment. The synchronization is obtained when the fuel bed is cooled to the brink ofextinguishment. Calculations for adiabatic conditions, including heat generation from combustion(nonlinear in temperature) and heat storage in sample (linear in temperature), predict divergingsample temperature. Experimentally, heat losses to surroundings (linear in temperature) preventtemperatures to increase without bounds and lead to pulsations.

Ort, förlag, år, upplaga, sidor
2018. Vol. 121, nr 5, s. 50002-p1-50002-p2
Nyckelord [en]
Fire, smoldering fire, industrial safety
Nyckelord [sv]
Brand, glödbrand, industri säkerhet
Nyckelord [no]
Brann, ulmebrann, industrisikkerhet
Nationell ämneskategori
Annan teknik Annan naturvetenskap
Identifikatorer
URN: urn:nbn:se:ri:diva-33789DOI: 10.1209/0295-5075/121/50002Scopus ID: 2-s2.0-85047299309OAI: oai:DiVA.org:ri-33789DiVA, id: diva2:1203579
Projekt
Emerging Risks from Smoldering FiresTillgänglig från: 2018-05-03 Skapad: 2018-05-03 Senast uppdaterad: 2019-01-10Bibliografiskt granskad

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Fjellgaard Mikalsen, Ragni

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Fjellgaard Mikalsen, RagniHagen, Bjarne C.Frette, Vidar
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