• 제목/요약/키워드: time-resolved time-resolved

검색결과 904건 처리시간 0.042초

2차원 시분해 레이저 유도 백열법을 이용한 에틸렌 확산 화염에서의 매연 입자 크기 측정 (Soot Primary Particle Size Measurement in a Ethylene Diffusion Flame Using Time-Resolved Laser-Induced Incandescence)

  • 손무강;문건필;김규보;이종호;정동수;전충환;장영준
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2004년도 추계학술대회
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    • pp.1140-1145
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    • 2004

  • Laser-induced incandescence (LII) is introduced as a valuable tool for the characterization of nanoparticles in flame environments. This technique is based on the heating of the particles by a short laser pulse and the subsequent detection of the thermal radiation. It has been applied successfully for the investigation of soot in different fields of application. The evaluation of the temporal decay of the laser-induced incandescence (LII) signal from soot particles is introduced as a technique to obtain two-dimensional distributions of particle sizes and is applied to a laminar diffusion flame. This novel approach to soot sizing exhibits several theoretical and technical advantages compared with the established combination of elastic scattering and LII, especially as it yields absolute sizes of primary particles without requiring calibration. With this technique a spatially resolved 2-D measurement of soot primary particle sizes is feasible in a combination process form the ratio of emission signals obtained at two delay times after a laser pulse, as the cooling behavior is characteristic of particle size.

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