한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제16권6호
  • /
  • Pages.148-156
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  • 2008
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  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

흡입밸브 각이 실린더 내 와류 발생 특성에 미치는 영향(I)

Effect of Inlet Valve Angle on In-Cylinder Swirl Generation Characteristics(I)

  • 엄인용 (서울산업대학교 기계공학과) ;
  • 박찬준 (서울산업대학교 기계공학과)
  • Ohm, In-Yong (Department of Mechanical Engineering, Seoul National University of Technology) ;
  • Park, Chan-Jun (Department of Mechanical Engineering, Seoul National University of Technology)
  • 발행 : 2008.11.01
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초록

This paper is the first of 2 companion papers which investigate in-cylinder swirl generation characteristics according to inlet valve angle. Two DOHC 4 valve engines, one has wide intake valve angle and the other has narrow valve angle, were used to compare the characteristics of swirl motion generation in the cylinder. One intake port was deactivated to induce swirl flow. A PIV (Particle Image Velocimetry) was applied to measure in-cylinder velocity field according to inlet valve angle during intake stroke. The results show that the stronger swirl motion is observed in wide valve angle engine at the early intake stage; however, the swirl motion is gradually distorted by the intake flow component passing through valve area near the cylinder wall as the stroke proceeds. The tumble motion also does so in wide angle. On the contrary, the swirl and tumble motions, which are not clear at the initial stage, become better and better arranged as the piston goes down and up again after bottom dead center.

키워드

참고문헌

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