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Effects of Pressure Tapping Conditions on Flow Rate Measurement of Triangular Separate Bar Differential Pressure Flow Meter  

Lee, Choong-Hoon (Department of Automotive Engineering, Seoul National University of Technology)
Publication Information
Journal of the Korean Society of Safety / v.25, no.2, 2010 , pp. 1-6 More about this Journal
Abstract
Flow characteristics of differential pressure flow meters which have a shape of triangular separate bar (TSB) was investigated according to the machining conditions in pressure tapping holes. Diameter of the pressure taping holes is either 1.0 mm or 1.5 mm. Also, number of the pressure tapping holes are drilled either 9 or 17. The mass flow rate of the TSB flow meters are calibrated with a laminar flow meter by connecting them in line. The mass flow rate in the TSB flow meters are plotted with a non-dimensional parameter H which includes the gas temperature, exhaust gas pressure and differential pressure at the flow meters. An empirical correlation between the mass flow rate at the TSB flow meter and the non-dimensional parameter H was obtained. The empirical correlation showed highly linear relationship between the mass flow rate and the non-dimensional parameter H. The hole size of the pressure tapping holes has a bigger effect on the flow rate than the number of the tapping holes.
Keywords
triangular separate bar; differential pressure flow meter; non-dimentionalized differential pressure parameter H; size of pressure tapping; number of pressure tapping;
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Times Cited By KSCI : 2  (Citation Analysis)
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