한국분무공학회지 (Journal of ILASS-Korea)

  • 제20권4호
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  • Pages.254-260
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  • 2015
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  • 1226-2277(pISSN)
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  • 2288-9051(eISSN)
한국분무공학회 (Institute for Liquid Atomization and Spray Systems-Korea)
권호 표지
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DOI QR Code

노즐 형상 변경이 소형 CRDI 엔진의 성능에 미치는 영향에 대한 수치 해석적 연구

Numerical Study on the Effect of Nozzle Geometry on the Small CRDI Engine Performance

  • 민세훈 (공주대학교 기계공학과 대학원) ;
  • 서현규 (공주대학교 기계자동차공학부)
  • 투고 : 2015.12.15
  • 심사 : 2015.12.29
  • 발행 : 2015.12.31
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초록

The objective of this study is to investigate the effect of multi-hole nozzle on the performance of small CRDI engine. Combustion and exhaust emission characteristics of engine were studied by using CFD simulation with ECFM-3Z combustion model. The conditions of simulation were varied with nozzle geometry, injection timing and injection quantity. In addition, the results were compared in terms of combustion pressure, rate of heat release, $NO_x$ and soot emissions. It was found that combustion pressure was increased when injection timing was advanced. The rate of heat release of 6 hole nozzle was higher than that of 12 hole nozzle since the quantity of fuel impinged at the bottom of piston rim was different under different injection timing conditions. In the case of $NO_x$ emission, 6 hole nozzle generated more $NO_x$ emission than 12 hole nozzle. On the other hand, in the case of soot emission, 12 hole nozzle showed higher value than 6 hole nozzle because injected fuel droplets from multi-hole nozzle were coalesced.

키워드

참고문헌

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