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Wall Shear Prediction for Wavy and Annular Air-Water Two-Phase Flow

[+] Author Affiliations
DuWayne Schubring, Andrea C. Ashwood, Timothy A. Shedd

University of Wisconsin-Madison, Madison, WI

Paper No. ICONE16-48110, pp. 107-116; 10 pages
doi:10.1115/ICONE16-48110
From:
  • 16th International Conference on Nuclear Engineering
  • Volume 3: Thermal Hydraulics; Instrumentation and Controls
  • Orlando, Florida, USA, May 11–15, 2008
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-4816-7 | eISBN: 0-7918-3820-X
  • Copyright © 2008 by ASME

abstract

Non-intrusive pressure drop, film thickness, and wave behavior measurements have been performed for horizontal air-water two-phase flow in round tubes. A databank of over 300 flow conditions in the wavy, wavy-annular, and annular regimes was compiled for three tube diameters (8.8 mm, 15.1 mm, and 26.3 mm). A correlation was developed based on the product of total mass flux, gas superficial velocity, and an empirical friction factor, selected from the lesser of a modified Froude number form and a Reynolds number form. This correlation performed to within 11% mean absolute error across the data range considered. A variety of correlations were also selected from the literature for comparison. Those based on film roughness (Wallis, Hurlburt-Newell), two-phase multipliers (Lockhart-Martinelli, Friedel, Chisholm, Olujic, and Grönnerud), and empirical data fits (Müller-Steinhagen and Heck) were among those tested. As needed, correlations were rephrased in terms of wall shear to provide a consistent basis for comparison. A complex film roughness model (Hurlburt et al.) was also compared to the experimental data.

Copyright © 2008 by ASME

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