대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제33권6호
  • /
  • Pages.454-460
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  • 2009
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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주위조건 변화에 대한 증발 디젤분무 거동특성 연구

Study on the Behavior Characteristics of the Evaporative Diesel Spray under Change in Ambient Conditions

  • 염정국 (동아대학교 기계공학부)
  • 발행 : 2009.06.01
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초록

To analyze the mixture formation process of evaporating diesel spray is important for emissions reduction in actual engines. Then the effects of change in density of ambient gas on spray structure in high temperature and pressure field have been investigated in this study. The ambient gas density was changed from ${\rho}_a=5.0kg/m^3$ to ${\rho}_a=12.3kg/m^3$ with CVC(Constant Volume Chamber). Also, simulation study by modified KIVA-II code was conducted and compared with experimental results. The ambient temperature and injection pressure are kept as 700K and 72MPa, respectively. The images of liquid and vapor phase in the evaporating free spray were simultaneously taken by exciplex fluorescence method. As experimental results, with increasing ambient gas density, the tip penetration of the evaporating free spray decreases due to the increase in the drag force from ambient gas. The spatial structure of a diesel spray can be verified as 2-regions consisted of liquid with momentum decrease and vapor with large-scale vortex. The calculated results obtained by modified KIVA-II code show good agreements with experimental results.

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참고문헌

  1. Hiroyasu, H., Kadota, T. and Tasaka, S., 1978, 'Study of the Penetration of Diesel Spray,' JSME, pp.3208-3219(in Japanese)
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피인용 문헌

  1. A Study of Numerical Analysis on Wall Impinging Spray vol.17, pp.2, 2013, https://doi.org/10.9726/kspse.2013.17.2.021
  2. Study on the Behavior Characteristics of Gasoline-Fuel Spray by Using a Numerical Analysis vol.33, pp.12, 2009, https://doi.org/10.3795/KSME-B.2009.33.12.992