A Study on Flow Characteristics of a Separate Triangular Bar Differential Pressure Flow Meter for Measuring Exhaust Flow Rate of Diesel Engine

디젤엔진 배기 가스 유량 측정용 삼각 분리 막대형 차압유량계 유량 특성 연구

  • 이충훈 (서울산업대학교 자동차공학과) ;
  • 김광일 (서울산업대학교 자동차공학과) ;
  • 김민창 (서울산업대학교 자동차공학과) ;
  • 박동선 (이플러스티(주))
  • Published : 2007.10.31


A separate triangular bar type differential pressure flow meter was developed for measuring exhaust gas flow rate from Diesel engine. Three kinds of the separate triangular bar flow meters whose aerodynamic angles are different one another are made and evaluated, respectively. The experimental results show that an aerodynamic shape has a effect on the pressure difference between upstream and downstream at the flow meter, that is, the thinner the shape of the separate triangular bar flow meter is, the smaller the pressure difference at the flow meter is. The separate triangular bar type flow meter was calibrated at both cold and high temperature of the gas flow. A burner system was designed for raising the gas temperature and it was well operated in controlling the gas temperature. An empirical correlation between mass flow rate and differential pressure at the separate triangular bar flow meter was obtained and the empirical correlation was also corrected by the gas temperature.


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