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Gas compression moderates flame acceleration in deflagration-to-detonation transition
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysik.
2012 (engelsk)Inngår i: Combustion Science and Technology, ISSN 0010-2202, E-ISSN 1563-521X, Vol. 184, nr 7-8, s. 1066-1079Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The effect of gas compression at the developed stages of flame acceleration in smooth-wall and obstructed channels is studied. We demonstrate analytically that gas compression moderates the acceleration rate, and we perform numerical simulations within the problem of flame transition to detonation. It is shown that flame acceleration undergoes three distinctive stages: (1) initial exponential acceleration in the incompressible regime, (2) moderation of the acceleration process due to gas compression, so that the exponential acceleration state goes over to a much slower one, (3) eventual saturation to a steady (or statistically steady) high-speed deflagration velocity, which may be correlated with the Chapman-Jouguet deflagration speed. The possibility of deflagration-to-detonation transition is demonstrated.

sted, utgiver, år, opplag, sider
2012. Vol. 184, nr 7-8, s. 1066-1079
Emneord [en]
Deflagration-to-detonation transition, Flame acceleration, Flame-obstacle interaction, Gas compression, Numerical simulations, Premixed burning
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Identifikatorer
URN: urn:nbn:se:umu:diva-59360DOI: 10.1080/00102202.2012.663995ISI: 000307190700016OAI: oai:DiVA.org:umu-59360DiVA, id: diva2:551744
Tilgjengelig fra: 2012-09-12 Laget: 2012-09-12 Sist oppdatert: 2018-06-08bibliografisk kontrollert

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Bychkov, VitalyValiev, Damir

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