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Heating of the fuel...
Heating of the fuel mixture due to viscous stress ahead of accelerating flames in deflagration-to-detonation transition
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- Valiev, Damir (författare)
- Umeå universitet,KTH,Materialvetenskap,Institutionen för fysik,Kungliga Tekniska Högskolan (KTH),Royal Institute of Technology (KTH),Umeå University
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- Bychkov, Vitaly (författare)
- Umeå universitet,Institutionen för fysik,Umeå University
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- Akkerman, V'yacheslav (författare)
- Umeå universitet,Institutionen för fysik,Umeå University
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- Eriksson, Lars-Erik, 1950 (författare)
- Department of Thermo- and Fluid Dynamics, Chalmers University of Technology,Chalmers, Dept Thermo & Fluid Dynam, SE-41296 Gothenburg, Sweden,Chalmers tekniska högskola,Chalmers University of Technology
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- Marklund, Mattias (författare)
- Umeå universitet,Institutionen för fysik,Umeå University
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(creator_code:org_t)
- Amsterdam : Elsevier BV, 2008
- 2008
- Engelska.
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Ingår i: Physics Letters A. - Amsterdam : Elsevier BV. - 0375-9601 .- 1873-2429. ; 372:27-28, s. 4850-4857
- Relaterad länk:
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http://arxiv.org/pdf...
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- The role of viscous stress in heating of the fuel mixture in deflagration-to-detonation transition in tubes is studied both analytically and numerically. The analytical theory is developed in the limit of low Mach number; it determines temperature distribution ahead of an accelerating flame with maximum achieved at the walls. The heating effects of viscous stress and the compression wave become comparable at sufficiently high values of the Mach number. In the case of relatively large Mach number, viscous heating is investigated by direct numerical simulations. The simulations were performed on the basis of compressible Navier–Stokes gas-dynamic equations taking into account chemical kinetics. In agreement with the theory, viscous stress makes heating and explosion of the fuel mixture preferential at the walls. The explosion develops in an essentially multi-dimensional way, with fast spontaneous reaction spreading along the walls and pushing inclined shocks. Eventually, the combination of explosive reaction and shocks evolves into detonation.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
Nyckelord
- CURVED STATIONARY FLAMES
- WIDE TUBES
- NONSLIP
- WALLS
- PROPAGATION
- SIMULATION
- MECHANISM
- Physics
- Fysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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