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Metering Correlation of Slotted Orifice for Low-pressure Wet Gas Flow


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Metering Correlation of Slotted Orifice for Low-pressure Wet Gas Flow
HUA Chen-quan12WANG Chang-ming1GENG Yan-feng2WANG Xiao-zhi2
1.School of Mechanical Engineering,NUST,Nanjing 210094,China;2.College of Information & Control Engineering,China University of Petroleum,Dongying 257061,China
wet gas slotted orifice metering correlation gas Froude Number gas to liquid density ratio
A slotted orifice in wet gas metering is required to find out a correlation to correct the liquid-induced over-reading.The wet gas response of the horizontally installed slotted orifice with 0.50 beta ratio is experimentally studied.After studying the relationship between the over-reading and Lockhart-Martinelli parameter,gas Froude number,the gas to liquid density ratio,a novel metering correlation for low-pressure wet gas flow is given.The results show that the new correlation corrects the liquid induced gas flow rate prediction error of the wet gas flow to ±4% at a 97% confidence level,with the conditions of pressure from 0.25 MPa to 0.35 MPa,Lockhart-Martinelli parameter from 0.02 to 0.6,and the gas Froude number from 0.5 to 2.7,which is distinctly more precise than other correlations of the slotted orifice.


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Last Update: 2012-11-02