Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Numerical Study on the Effects of Velocity Profile Distortion and Swirl on Pressure Difference of Orifice Flowmeter Due to Pipe structure

배관구조에 따른 속도분포 변형과 선회가 오리피스 유량계의 압력차에 미치는 영향에 대한 수치적 연구

  • 김홍민 (인하대학교 대학원 기계공학과) ;
  • 허재영 (한국가스공사 연구개발원) ;
  • 김광용 (인하대학교 기계공학부)
  • Published : 2003.10.01
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Abstract

Three-dimensional pipe flows with elbows, tees and headers in three different pipe systems are calculated to estimate the effect of asymmetry of axial velocity profile and swirl on measuring accuracy of an orifice flowmeter. It is evaluated how the pressure difference across the orifice is dependent on the upstream straight pipe length and how swirl intensity, swirl angle, and axial velocity distribution affect the measuring error of the orifice flowmeter. From the results, it is found that variation of the pressure difference across the orifice is negligible in case that maximum swirl angle is less than 2$^{\circ}$, and also that the pressure difference across the orifice is more sensitive to the asymmetry of axial velocity profile rather than the swirl intensity.

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References

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