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http://dx.doi.org/10.3795/KSME-B.2003.27.10.1450

Numerical Study on the Effects of Velocity Profile Distortion and Swirl on Pressure Difference of Orifice Flowmeter Due to Pipe structure  

Kim, Hong-Min (인하대학교 대학원 기계공학과)
Kim, Kwang-Yong (한국가스공사 연구개발원)
Her, Jae-Young (인하대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.27, no.10, 2003 , pp. 1450-1456 More about this Journal
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.
Keywords
Orifice Flowmeter; Swirl Intensity; Swirl Angle; Asymmetry of Axial Velocity Profile;
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  • Reference
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