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The Effect of LII Interference on the Measurement of PAH's LIF Signals using Ar-Ion Laser

아르곤이온 레이저를 이용한 확산화염 내 PAH의 LIF 신호 측정에 LII 신호가 미치는 영향

  • Ahn, Taekook (Department of Mechanical Engineering, Dankook university) ;
  • Bae, Seungman (Department of Mechanical Engineering, Dankook university) ;
  • Lee, Wonnam (Department of Mechanical Engineering, Dankook university) ;
  • Park, Sunho (Department of Mechanical Engineering, Dankook university)
  • Received : 2017.12.06
  • Accepted : 2018.02.12
  • Published : 2018.03.30

Abstract

The effect of LII interference on the measurement of LIF signals from PAH in a diffusion flame has been investigated. Argon-ion laser at 488 nm was vertically or horizontally polarized, and irradiated to the centerline of the flame at varying flame height. Signals from PAH-rich regions measured at 515 nm were mostly LIF signals, however, signals from soot-rich regions were determined to be mixed with Mie scattering signals and/or LII signals. Signals measured 1 mm above the excitation height were mostly LII signals from soot particles. The results show that a quantitative determination of the LIF's contribution to the measured signals would be difficult as long as the experimental setup described here is used for the regions where PAHs and soot particles exist together.

Acknowledgement

Grant : 선박배출 대기오염원(PM, BC) 기후변화 영향평가 및 저감기술 개발

Supported by : 해양수산부, 한국연구재단

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