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Local Liquid Velocity in Vertical Air-Water Bubbly Downward Flow

[+] Author Affiliations
Xiaodong Sun, Sidharth Paranjape, Seungjin Kim, Hiroshi Goda, Mamoru Ishii

Purdue University, West Lafayette, IN

Joseph M. Kelly

U.S. Nuclear Regulatory Commission, Rockville, MD

Paper No. FEDSM2003-45548, pp. 1673-1683; 11 pages
doi:10.1115/FEDSM2003-45548
From:
  • ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
  • Volume 1: Fora, Parts A, B, C, and D
  • Honolulu, Hawaii, USA, July 6–10, 2003
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3696-7 | eISBN: 0-7918-3673-8
  • Copyright © 2003 by ASME

abstract

Local characteristics of the liquid phase in downward air-water bubbly and slug flows were investigated in a 50.8-mm inner-diameter round pipe. A laser Doppler anemometry system was used to measure axial liquid velocity and its fluctuations. To reduce the measurement uncertainty, the experiments were performed in flow conditions with low void fraction. The comparisons between the liquid flow rates measured by the magnetic flow meter and those obtained from the local measurements showed good agreements. In addition, based on the LDA measurements and the data acquired by the local conductivity probes, the local relative velocity distribution, the distribution parameter and the drift velocity in the drift-flux model were obtained for the current downward flow.

Copyright © 2003 by ASME

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