Influence of gas compression on flame acceleration in channels with obstacles

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2010.06.006· OSTI ID:21350377

Bychkov, Vitaly; Valiev, Damir ^[1]; Akkerman, V'yacheslav; Law, Chung K ^[2]

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1. Department of Physics, Umea University, SE-90187 Umea (Sweden)
2. Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08544-5263 (United States)

The role of gas compressibility in flame acceleration in channels with obstacles is studied analytically. The theory is consistent with the mechanism of extremely fast flame acceleration in obstructed channels obtained recently by Bychkov et al. [Bychkov et al., Phys. Rev. Lett. 101 (2008) 164501]. The present theory accounts for small but finite gas compressibility through expansion for small initial Mach number up to the first-order terms. It is demonstrated that flame-generated compression waves moderate the acceleration process noticeably, and that, for finite but small gas compression, the theory is in good quantitative agreement with numerical simulations. (author)

• OSTI ID: 21350377
• Journal Information: Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 10 Vol. 157; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ACCELERATION
COMPRESSIBILITY
COMPRESSION
COMPUTERIZED SIMULATION
EXPANSION
FLAME PROPAGATION
FLAMES
GASES
MACH NUMBER