Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Numerical Analysis of Flow Characteristics in Swirl Chamber Type Diesel Engine

연락공 형상에 따른 와류실식 디젤기관의 유동 특성 수치해석

  • Kwon Taeyun (Graduate School of Automotive Engineering, Keimyung University) ;
  • Choi Gyeungho (Department of Mechanical & Automotive Engineering, Keimyung University)
  • 권태윤 (계명대학교 대학원 자동차공학과) ;
  • 최경호 (계명대학교 기계자동차공학부)
  • Published : 2005.07.01
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Abstract

In this study, in-cylinder flow of the swirl chamber type diesel engine numerically simulated by VECTIS code. The flow fields during the intake and compression process were also investigated in detail. Numerical results revealed that the generation and distortion of the swirling, tumbling vortices and those influences on turbulence kinetic energy by shape of the jet passage, angle and area. It was also found that flow characteristics were affected by inflow velocity that depends on change of the jet passage shape. Swirl ratio was increased according to decrease of jet passage area, and was affected by piston motion according to increase of jet passage angle. Tumbling vortices had the similar in various cases, but tumble ratio was increased with the inflow velocity. The generation of turbulence kinetic energy was considerably influenced by complex effects of swirling and tumbling vortices.

Keywords

References

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