한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제5권3호
  • /
  • Pages.137-146
  • /
  • 1997
  • /
  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

강체선회 유동이 분무 구조에 미치는 영향

Effect of Solid Body rotating Swirl on Spray Structure

  • 이충훈 (서울대하교 대학원) ;
  • 최규훈 (정회원, 기아자동차(주)) ;
  • 노석홍 (정회원, 기아자동차(주)) ;
  • 정석호 (정회원, 서울대학교 기계공학과)
  • 발행 : 1997.05.01
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초록

Spray characteristics of high pressure injectors for diesel engines have been experimentally studied with special emphasis on the effect of swirl. A constant volume chamber was rotated in order to generate a continuous swirl having the flow field of a solid body rotation, resulting in the linear dependance of the swirl number on the rotating speed of the chamber. Emulsified fuel is injected into the chamber and the developing process of fuel sprays is visualized. The fuel spray developing process in D.I. diesel engine was investigated by this liquid injection technique. The effect of swirl on the spray tip penetration is quantified through modelling. Results show that the spray tip penetration is qualitatively different for low and high pressure injections. For high pressure injection case, a good agreement is achieved between the experimental results and the modeling accounting the effect of swirl. For low pressure injection, a reasonable agreement is obtained. It is found that excessive swirl may cause adverse effect on spray dispersion during the initial combustion period since the spray can not be impinged on chamber wall.

키워드

참고문헌

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