• Title/Summary/Keyword: 분무액적군

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A study on the spray and flame by optically accessible D.I. diesel engine : analysis by Schlieren method and diffused background illumination method (가시용 직분식 디젤기관의 분무와 화염에 관한 연구)

  • 안수길;이덕보;라진홍
    • Journal of Advanced Marine Engineering and Technology
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    • v.19 no.3
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    • pp.9-23
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    • 1995
  • To analyze the spray and flame in D.I. diesel engine, the visualizing methods by schlieren photograph and diffused background illumination photograph with high speed camera are applied to optically accessible D.I.diesel engine. Wcaporating spray, spray droplets and brightness flame are taken with high speed camera by visuallizing method in accordance with various suction air temperature and injection time. The spray and flame image on the film was analyzed by image analyzer. The optically accessible D.I. diesel engine had the similar pressure characteristic to the real D.I. diesel engine. Experimental results showed that shadow areas of the evaporating spray were extended at higher suction air temperature, spray droplets had a max. Penetration length and their penetrating patterns were dependent on the surrounding gas temperature, and flame size after ignition was largely governed by the evaporated fuel quantity at ignition point and by the surrounding gas condition due to piston motion.

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A Study on the Characteristics of D. I. Diesel Spray·Flame in Operating Condition (Analysis by Diffused Background Illumination Method) (운전조건에 따른 D.I. 디젤기관의 분무·화염의 특성에 관한 연구 (배경산란광그림자사진법에 의한 해석))

  • Ra, J.H.;Lee, D.B.;Ahn, S.K.
    • Transactions of the Korean Society of Automotive Engineers
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    • v.3 no.6
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    • pp.30-40
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    • 1995
  • Optically accessible D. I. diesel engine with a rectangular combustion chamber was constructed to visualize the behaviors of sprays and flames in the combustion camber with the close conditions of pressure and temperature in an actual engine. The behaviors of sprays and flames in the combustion chamber as the operating conditions of this engine were photographed with high speed camera by Diffused Background Illumination Method. With photographs taken by this method, behavior of spray droplets injected into the combustion chamber, ignition points, and flame propagation were observed and analyzed at a time-and space-dependent fashion.

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