지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2001.12
- 수록면
- 127 - 131 (5page)
이용수
초록· 키워드
오류제보하기
To investigate the structure of reaction zone and the early process of young soot formation in a diesel spray flame, CH radical and polycyclic aromatic hydrocarbons formed in a flame were visualized two-dimensionally and simultaneously, CH radical was used as the indicator of reaction zone in a flame because CH is produced and destroyed in fuel decomposition zone and exists in thin layer near the stoichiometric contour in a flame, For the visualization of early soot formation zone in a flame, the polycyclic aromatic hydrocarbons (PAH) were used as tracers in LIF technique, PHA are well known as the precursors of young soot.
A Nd:Y AG pumped dye laser was used as a light source. The wavelength of incident light was tuned to 390.58 nm to excite CH with the 01(8.5) transition of B²Σ-X²Ⅱ v '=0, v "=0) band. The sheet of light passed through the mid-plane of the flame and the LIF from the species in a flame were imaged by an ICCD camera. A narrow band optical filter with a central wavelength of 430 nm and a FWHM of 10 nm was used to detect the fluorescence from CH with the transition of A²Σ -X²Ⅱ (v '=0, v "=0) band. The LIF spectrum of PAH formed in a flame was detected by a spectrometer at excitation wavelengths of 266 nm, 355 nm and 390 nm. These spectrum were analyzed for identification of P AH formed in a flame.
In preliminary experiments, CH and PAH formed in a diffusion burner flame were visualized two-dimensionally. Methane and propane were used as fuel. In the LIF images of gas jet diffusion flames, LIF of CH can be observed as the very thin layers with the width of less than 1 mm located in the flame periphery. In the central region surrounded by CH thin layer, the strong LIF from PAH can be seen. The LIF from central region of the jet has broad spectrum whose peak is at 440 nm.
A Nd:Y AG pumped dye laser was used as a light source. The wavelength of incident light was tuned to 390.58 nm to excite CH with the 01(8.5) transition of B²Σ-X²Ⅱ v '=0, v "=0) band. The sheet of light passed through the mid-plane of the flame and the LIF from the species in a flame were imaged by an ICCD camera. A narrow band optical filter with a central wavelength of 430 nm and a FWHM of 10 nm was used to detect the fluorescence from CH with the transition of A²Σ -X²Ⅱ (v '=0, v "=0) band. The LIF spectrum of PAH formed in a flame was detected by a spectrometer at excitation wavelengths of 266 nm, 355 nm and 390 nm. These spectrum were analyzed for identification of P AH formed in a flame.
In preliminary experiments, CH and PAH formed in a diffusion burner flame were visualized two-dimensionally. Methane and propane were used as fuel. In the LIF images of gas jet diffusion flames, LIF of CH can be observed as the very thin layers with the width of less than 1 mm located in the flame periphery. In the central region surrounded by CH thin layer, the strong LIF from PAH can be seen. The LIF from central region of the jet has broad spectrum whose peak is at 440 nm.
목차
Abstract
1.Introduction
2.Experimental
3.Results and Discussions
4.Conclusions
REFFERENCES
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UCI(KEPA) : I410-ECN-0101-2009-556-014132154