Review of Critical Flowmeters for Gas Flow Measurements

[+] Author and Article Information
B. T. Arnberg

Department of Mechanical Engineering; Engineering Experiment Station, University of Colorado, Boulder, Colo.

J. Basic Eng 84(4), 447-457 (Dec 01, 1962) (11 pages) doi:10.1115/1.3658664 History: Received August 02, 1961; Online November 04, 2011


Critical flowmeters for accurately measuring the mass flow rates of nonreacting real gases were reviewed. Discussions were presented on theoretical flow functions, on parameters for correlating discharge coefficients, and on the importance of real gas properties. The performance characteristics of critical nozzles and orifices of several designs were reviewed. Approaches were discussed to problems which must be researched before the fullest potential of this type of flow measurement can be realized.

Copyright © 1962 by ASME
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