Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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An Experimental Study of In-Cylindeer Flow Characteristics of a High Speed Direct Injection Diesel Engine

고속 직접분사식 디젤엔진의 실린더내 유동특성에 관한 실험적 연구

  • 정경석 (한국기술교육대학교 동력기계공학과)
  • Published : 1996.05.01
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Abstract

In-cylinder flow of a purpose-built small HSDI Hydra Diesel engine was investigated by laser Doppler velocimetry(LDV) during induction and compression processes. The flow was quantified in terms of ensemble-averaged axial and swirl velocities, normalized by the mean piston speed, at a plane located 12mm from the cylinder head and corresponding to the mid-plane of the diametrically-opposed quartz windows at an enigne speed of 1000rpm. The formation of toroidal vortices during the intake process and the evolution and decay of swirl motion during the compression process were observed. Turbulence at around TDC of compression became homogeneous and isotropic.

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References

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