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A Study on the Characteristics of Swirl Flow in Transparent Engine with Different Swirl Ratio and Piston Configuration for Heavy-duty LPG Engine

대형 LPG엔진용 피스톤 형상 및 흡기포트 선회비 최적화를 위한 가시화엔진내 스월유동특성 해석

  • 이진욱 (한국기계연구원 청정동력기계그룹) ;
  • 강건용 (한국기계연구원 청정동력기계그룹) ;
  • 민경덕 (서울대학교 기계항공공학부)
  • Published : 2004.01.01

Abstract

The configuration of intake port and piston is a dominant factor of inlet air flow and mixture formation in an engine cylinder, resepectively. This study has analyzed intake port and piston characteristics for swirl flow of a heavy-duty LPG engine. As an available technology to optimize intake port, the steady flow rig test has been applied for measuring swirl ratio and mean flow coefficient. And we measured the mean velocity and turbulence intensity of swirl flow under motoring condition in transparent engine cylinder by backward scattering LDV system. From these results, the piston and cylinder head with a good evaluated swirl flow characteristics were developed and adapted fur a 11L heavy-duty engine using the liquid phase LPG injection (LPLI) system. The obtained results are expected to be a fundamental data for developing intake port and piston.

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References

  1. Kang, K. Y. and Reitz, R. D., 2000, 'Intake Flow Structure and Swirl Generation in Four Valve Heavy Duty Diesel Engine,' ASME, Vol. 122 https://doi.org/10.1115/1.1290149AdditionalInformation
  2. Martin, J. K., Plee, S. L. and Rembiski, D. J., 1988, 'Burn Modes and Prior Cycle Effects on Cyclic Variations in Lean-Bum Spark-Iginition Engine Combustion,' SAE 880201
  3. Fansler, T. D., 1993, 'Turbulence Production and Relaxation in Bowl-in Piston Engine,' SAE 930479
  4. Stone, C. R. and Ladommatos, N., 1992, 'The Measurement and Analysis of Swirl in Steady Flow,' SAE 921642