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Influence of the Gas Injection on the Void Fraction Profiles and Bubble Size Distributions of a Air-Water Flow in Vertical Pipes

Prasser, H.-M.

The paper reports about air-water tests in two different vertical pipes, one of 52.3 mm inner diameter, the other of 194.1 mm. In both cases, wire-mesh sensors with a measuring frequency of 2500 Hz were applied. They were used to measure radial gas fraction profiles, velocity profiles and bubble size distributions. Scaling effects were found by comparing the results for the two different pipe diameters. A variation of the air injection conditions allowed to study the influence of the primary bubble size. It was found that the kind of gas injection has a deciding influence at the appearance of a wall peak in the gas fraction profile as well as at the establishing gas fraction profiles and bubble size distributions in general.

Keywords: Gas-liquid flow; two-phase flow; wire-mesh sensor; gas fraction profiles; gas velocity profiles; bubble size

  • Lecture (Conference)
    5th International Conference on Multiphase Flow, ICMF’04, 30.05.-04.06.2004, Yokohama, Japan
  • Contribution to proceedings
    5th International Conference on Multiphase Flow, ICMF’04, 30.05.-04.06.2004, Yokohama, Japan, paper 187

Permalink: https://www.hzdr.de/publications/Publ-6381
Publ.-Id: 6381