Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Study on Evaluation Method of Flow Characteristics in Steady Flow Bench(2) - Comparison of ISM and PIV Measurement

정상유동 장치에서 유동 특성 평가 방법에 대한 연구(2) - ISM와 PIV 측정의 비교

  • Park, Chanjun (Department of Mechanical & Automotive Engineering, Seoul National University of Science and Technology) ;
  • Ohm, Inyong (Department of Mechanical & Automotive Engineering, Seoul National University of Science and Technology)
  • 박찬준 (서울과학기술대학교 기계.자동차공학과) ;
  • 엄인용 (서울과학기술대학교 기계.자동차공학과)
  • Received : 2014.11.10
  • Accepted : 2014.11.26
  • Published : 2015.01.01
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Abstract

This paper is the second investigation on the evaluation methods of flow characteristics in a steady flow bench. In the previous work, several assumptions used in the steady flow bench were examined and it was concluded that the assumption of the solid rotation might cause serious problems. In this study, intake valve angle is selected as a main parameter for the assessment because the main flow direction to cylinder governed by this angle has the strongest influence on the in-cylinder flow pattern. For this purpose, four heads, which have the different angle, are prepared and the flow characteristics are estimated both by the conventional impulse swirl meter and a particle image velocimetry at 1.75 times bore position apart from the cylinder head, which is widely used plane in the steady flow measurement. The results show that both of the eccentricity and the velocity profile distort the flow characteristics when using the ISM at 1.75 plane, however, the effects of two factors act in the opposite direction. In addition, the profile's influence is much greater than that of the eccentricity.

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References

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