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Title: Standardization Of Vortex Shedding Flowmeter
Author: m. Takamoto, Y. Terao
Source: 1999 International Symposium on Fluid Flow Measurement
Year Published: 1999
Abstract: The design of a vortex shedding flowmeter has been optimized for its standardization. The optimization was achieved by evaluating the linearity of the flowmeters with various bluff bodies. It was found that the Strouhal number of the optimized flowmeter has a constant value of 0.2503 in the Reynolds number range of about 105 to 2 x 106. The effect of the installation conditions of the flowmeter on the measurement error was examined. The sensitivity of each flowmeter dimension to the K-factor of the flowmeter was also evaluated. The results indicated that the uncertainty of dry calibration of the flowmeter is satisfactorily small and actual calibration results of many flowmeters demonstrated the practical usefulness of dry calibration. Most of the experiments were carried out using the test facility for water meters at NRLM, and additional experiments to evaluate the performance of the flowmeter in a higher Reynolds number range were performed using high pressure gas meter test facilities in many countries.

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