Effects of acoustic excitation on the combustion emission characteristics of a non-premixed flame

비예혼합 화염에서 음향 가진이 연소 배출 특성에 미치는 영향

  • 이기만 (전남도립담양대학 기계자동차공학부) ;
  • 박정 (순천대학교 기계자동차공학부) ;
  • 조한창 (포항산업과학연구원)
  • Published : 2001.06.27

Abstract

The effects of external excitation with various frequencies and amplitudes on the flame behavior and pollution emission characteristics from a laminar jet flame are experimentally investigated. Measurements of $NO_{x}$ emission indices($EINO_{x}$), performed in unconformed and vertical lifted flame at resonance frequency by strong excitation, have been conducted experimentally. It was also conducted to investigate the effects of excited frequency on $NO_{x}$ emissions with a various frequency ranged 0Hz to 2kHz. From the vertical lifted flame like turbulent of the excited jet with resonance frequency was shown that the dependence of $NO_{x}$ emission could be categorized into three groups: Group 1 of intermediate flame length and relative narrow flame volume yielding low $NO_{x}$ emission, Group 2 of short flame length but large flame volume yielding high $NO_{x}$ emission and Group 3 of long flame length with low temperature contours yielding high $NO_{x}$ emission.

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