Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Planar measurements of OH and $O_{2}$ number density in premixed $C_{3}$H$_{8}$O$_{2}$ flame using laser induced pre-dissociative fluorescence

레이저 유도 선해리 형광법(LIPE)을 이용한 화염내 OH 및 $O_{2}$ 분자의 2차원 농도 분포 측정

  • 진성호 (경희대학교 대학원 기계공학과) ;
  • 남기중 (고등기술연구원) ;
  • 김회산 ((주)브이-텍 광계측기술연구소) ;
  • 장래각 ((주)브이-텍 광계측기술연구소) ;
  • 박승환 (연세대학교 이과대학 물리학과) ;
  • 김웅 (연세대학교 이과대학 물리학과) ;
  • 박경석 (경희대학교 공과대학 기계공학과) ;
  • 심경훈 (서울도시가스(주)) ;
  • 김경수 (생산기술연구원 청정생산기술개발사업단)
  • Published : 1996.12.01
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Abstract

Planar images of OH and $O_{2}$ with tunable KrF excimer laser which has a) 0.5 $cm^{-1}$ / linewidth, b) 0.5 nm tuning range, c) 150 mJ pulse energy, and d) 20 ns pulse width are obtained to determine spatial distributions of OH and $O_{2}$ in premixed $C_{3}$H$_{8}$ /O$_{2}$ flame. The technique is based on planar laser induced pre-dissociative fluorescence(PLIPF) in which collisional quenching is almost avoided because of the fast pre-dissociation. Dispersed LIPF spectra of OH and $O_{2}$ are also measured in a flame in order to confirm the excitation of single vibronic state of OH and $O_{2}$, OH and $O_{2}$ are excited on the P$_{2}$(8) line of the $A^{2}$.SIGMA.$^{+}$(v'= 3)-X$^{2}$.PI.(v'||'||'&'||'||'quot;= 0) band and R(17) line of the Schumann-Runge band B$^{3}$.SIGMA.$_{u}$ $^{[-10]}$ (v'= 0)- X$^{3}$.SIGMA.$_{g}$ $^{[-10]}$ (v'||'||'&'||'||'quot;= 6), respectively. Dispersed OH and $O_{2}$ spectra show an excellent agreement with simulated spectrum and previous works done by other group respectively. It is confirmed that OH widely distributed around flame front area than $O_{2}$.

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