한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제15권1호
  • /
  • Pages.116-124
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  • 2007
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  • 1225-6382(pISSN)
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  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

디젤기관 배기 배출물에 있어서 매연 응집체 크기 및 농도의 시간적 계측에 관한 연구

A Study on Temporal Measurement of Size and Concentration for Soot Aggregates among Exhaust Emissions in Diesel Engines

  • 배명환 (경상대학교 기계항공공학부, 항공기부품기술연구센터) ;
  • ;
  • 배창환 (동경공업대학 대학원)
  • Bae, Myung-Whan (Research Center for Aircraft Parts Technology, School of Mechanical and Aerospace Engineering, Gyeongsang National University) ;
  • Kamimoto, Takeyuki (Joint Research Center of Future Science & Technology, Tokai University) ;
  • Bae, Chang-Hwan (Microsystem Research Center, Graduate School of Science and Engineering, Tokyo Institute of Technology)
  • 발행 : 2007.01.01
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초록

An optical method to measure the size and number density of soot aggregates in diesel exhaust has been proposed in this study. Two laser beams in co-axial alignment transmit a soot loaded exhaust gas flow, and the transmittance at each wavelength is detected by a photo diode simultaneously. The volume equivalent diameter and number density of soot aggregates in the optical path can be theoretically given by the transmittance values measured at two wavelengths. A test conducted by a single cylinder, 4 cycle, small and DI diesel engine shows that the temporal variations of the size and number density of soot aggregates in the diesel exhaust can be measured by the proposed method at a transient mode operation. It is found that the volume equivalent diameter varied temporally from 70 to 110 nm during the period that high soot concentration is observed. One can also conclude that the optical length longer than 1 m in the dynamic range regarding this method is preferable for measuring soot concentration at the level of $1\;mg/m^3$.

키워드

참고문헌

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