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Droplet Transfer in Two-Phase Annular Mist Flow : Part 1, Experiment of Droplet Transfer Rate and Distributions of Droplet Concentration and Velocity

1972; Japan Society Mechanical Engineers; Volume: 15; Issue: 90 Linguagem: Inglês

10.1299/jsme1958.15.1568

1881-1426

Sadahiro Namie, Tatsuhiro UEDA,

Aerosol Filtration and Electrostatic Precipitation

The experimental results are described on the transfer rate of liquid droplet onto the duct wall, the distributions of the droplet volumetric fraction, the droplet and gas velocities, and the pressure loss for a two-phase (Air-water) annular mist flow through a horizontal rectangular duct. The mean diameter of droplets was in a range from 27 to 40 microns in this experiment. The droplet transfer coefficient onto the wall derived from the experimental results indicates that it is affected by the droplet concentration as well as the gas velocity. Therefore, for investigating the mechanism of droplet transfer, the effect of the eddy diffusivity of the gas flow containing the droplets is discussed from the relation between the distribution of velocity and that of shear stress in the gas stream.