An Investigation of the Flow Characteristics in the Disturbance Wave Region of Annular Flow : 1st Report, Effect of Tube Diameter

概要

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A computer-aided data reduction method was newly developed for determining principal flow parameters on disturbance wave and liquid film in gas-liquid two-phase annular flow. Hold-up data on magnetic tape were processed by computer to discriminate disturbance wave from base-film based on the proposed criteria and to evaluate flow parameters with sub-stantial reduction of time and labor. Four test tubes of 8,12,18 and 26 mm bore were employed, and time-varying liquid hold-up was recorded by means of the constant-current method. The flow parameters computed were velocity, frequency, separation distance and height of disturbance waves, base-film thickness, and superficial film thickness. It was found that most of the flow parameters present a maximum or minimum with the tube of 12 mm bore.
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