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Title: Reynolds Number And Installation Effects On Turbine Meters
Author: Joel T. Park
Source: 1995 International Symposium on Fluid Flow Measurement
Year Published: 1995
Abstract: Experimental results are presented for four 100-mm (4-inch) turbine meters from three manufacturers and four models. Tests were performed with nitrogen gas in the Low Pressure Loop of the Gas Research Institute (GRI) Metering Research Facility (MRF). The turbine meters were calibrated gas by binary weighted sonic nozzles which were calibrated against a primary gravimetric standard. Reynolds number effects were determined from operating pressures of 0.206 and 0.793 MPa (30 and 115 psia) and flowrates of 34 to 510 m3/h (1,200 to 18,000 acfh). The range for the same Reynolds number at the two pressures was 62,000 to 251,000. The difference in meter factor for the 100-mm (4-inch) meters for two pressures at the same Reynolds number was within 0.4 %. The 100-mm meters were also tested in the A.G.A. Report 7 short-coupled installation. The largest difference from the baseline calibration was -0.3 %. The small difference appears to be a velocity profile effect of two closely coupled elbows in the same plane with the entering and exiting flow in the same direction.