Mechanism of fast flame acceleration in cylindrical tubes with obstacles

V. B. Akkerman, C. K. Law, D. M. Valiev, V. V. Bychkov, L. E. Eriksson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The physical mechanism of fast flame acceleration in tubes with obstacles is explained by recognizing that delayed burning between the obstacles creates a powerful jet flow which drives the acceleration. It is demonstrated theoretically and computationally that this mechanism is unlimited in time and independent of the Reynolds number, and it is much stronger and qualitatively different from the classical Shelkin mechanism of flame acceleration due to wall friction. As long as the gas compression is weak, the flame accelerates exponentially, with an enormous acceleration rate. We present formulae describing evolution of the flame tip, as well as its velocity and acceleration rate. Furthermore, it is shown that flames accelerate noticeably stronger in the axisymmetric cylindrical geometry as compared to the planar one.

Original languageEnglish (US)
Title of host publicationFall Meeting of the Eastern States Section of the Combustion Institute 2009
PublisherCombustion Institute
Pages301-307
Number of pages7
ISBN (Electronic)9781615676682
StatePublished - Jan 1 2009
EventFall Meeting of the Eastern States Section of the Combustion Institute 2009 - College Park, United States
Duration: Oct 18 2009Oct 21 2009

Publication series

NameFall Meeting of the Eastern States Section of the Combustion Institute 2009

Other

OtherFall Meeting of the Eastern States Section of the Combustion Institute 2009
CountryUnited States
CityCollege Park
Period10/18/0910/21/09

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Physical and Theoretical Chemistry

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  • Cite this

    Akkerman, V. B., Law, C. K., Valiev, D. M., Bychkov, V. V., & Eriksson, L. E. (2009). Mechanism of fast flame acceleration in cylindrical tubes with obstacles. In Fall Meeting of the Eastern States Section of the Combustion Institute 2009 (pp. 301-307). (Fall Meeting of the Eastern States Section of the Combustion Institute 2009). Combustion Institute.