Theoretical and experimental studies on mesoscale propagation and extinction

Yiguang Ju, Bo Xu

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

Abstract

Mesoscale flame propagation and extinction of premixed flames in channels were investigated theoretically and experimentally. Channel width, flow velocity, and wall thermal properties had effects on the flame propagation and led to multiple flame regimes and extinction limits. With the decrease of channel width, there existed two distinct flame regimes, a fast burning regime and a slow burning regime. The existence of the new flame regime and its extended flammability limit rendered the classical quenching diameter inapplicable. At optimum conditions of flow velocity and wall thermal properties, mesoscale flames could propagate faster than the adiabatic flame. Numerical simulation with detailed chemistry demonstrated the existence of multiple flame regimes. There was a nonlinear dependence of the flame speed on equivalence ratio. Moreover, the Nusselt number had a significant impact on this non-linear dependence. The nonlinear dependence of flame speed on equivalence ratio for both flame regimes was measured using a C3H8-air mixture. The results were in good agreements with the theory and numerical simulation.

Original languageEnglish (US)
Title of host publication30th International Symposium on Combustion, Abstracts of Symposium Papers
Number of pages1
StatePublished - Jan 1 2004
Event30th International Symposium on Combustion, Abstracts of Symposium Papers - Chicago, IL, United States
Duration: Jul 25 2004Jul 30 2004

Other

Other30th International Symposium on Combustion, Abstracts of Symposium Papers
CountryUnited States
CityChicago, IL
Period7/25/047/30/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Ju, Y., & Xu, B. (2004). Theoretical and experimental studies on mesoscale propagation and extinction. In 30th International Symposium on Combustion, Abstracts of Symposium Papers