Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Prediction of Diesel Fuel Spray Characteristics in Compression Ignition Engine Cylinder by Intake Humidification

흡기 가습에 의한 압축 착화엔진 실린더 내 디젤 연료 분무 특성 예측

  • 민세훈 (공주대학교 기계공학과 대학원) ;
  • 서현규 (공주대학교 기계자동차공학부)
  • Received : 2018.02.02
  • Accepted : 2018.03.26
  • Published : 2018.03.31
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Abstract

The objective of this study is to predict numerically the effect of intake humidification on the injected diesel fuel spray characteristics in a compression ignition engine. In this work, Wave model and Ducowicz model were applied as the break-up model and evaporation model, respectively. The amount of water vapor for the humidification was changed from 0% to 30% of injected fuel mass. The number of applied meshes was generated from 49,000 to 110,000. At the same time, the results of this work were compared in terms of spray tip penetration, SMD and equivalence ratio distributions. It was found that the cylinder temperature and cylinder pressure were decreased with increasing water vapor mass by vaporization latent heat and specific heat, however, the difference was very small. So, the spray tip penetration was not different by water vapor mass. Also, higher equivalence ratio distributions were observed with increasing water vapor mass by the improvement of fuel atomization.

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References

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