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http://dx.doi.org/10.15231/jksc.2013.18.2.042

Linear Stability Analysis of Cellular Counterflow Diffusion Flames with Radiation Heat Loss  

Lee, Su Ryong (서울과학기술대학교 기계자동차공학과)
Publication Information
Journal of the Korean Society of Combustion / v.18, no.2, 2013 , pp. 42-50 More about this Journal
Abstract
Linear stability analysis of radiating counterflow diffusion flames is numerically conducted to examine the instability characteristics of cellular patterns. Lewis number is assumed to be 0.5 to consider diffusional-thermal instability. Near kinetic limit extinction regime, growth rates of disturbances always have real eigen-values and neutral stability condition of planar disturbances perfectly falls into quasi-steady extinction. Cellular instability of disturbance with transverse direction occurs just before steady extinction. However, near radiative limit extinction regime, the eigenvalues are complex and pulsating instability of planar disturbances appears prior to steady extinction. Cellular instability occurs before the onset of planar pulsating instability, which means the extension of flammability.
Keywords
Cellular instability; Diffusion flame; Diffusional-thermal instability; Radiation heat loss;
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Times Cited By KSCI : 1  (Citation Analysis)
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