Journal of the Korean Society of Combustion (한국연소학회지)

The Korean Society of Combustion (한국연소학회)
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Linear Stability Analysis of Cellular Counterflow Diffusion Flames with Radiation Heat Loss

복사 열손실을 받는 셀모양 대향류 확산화염의 선형 안정성 해석

  • 이수룡 (서울과학기술대학교 기계자동차공학과)
  • Received : 2013.04.22
  • Accepted : 2013.06.08
  • Published : 2013.06.28
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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

References

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Cited by

  1. Numerical Analysis of Characteristics of Cellular Counterflow Diffusion Flames near Radiative Extinction Limit vol.38, pp.6, 2014, https://doi.org/10.3795/KSME-B.2014.38.6.493