ANALYSIS OF THE CHARACTERISTICS OF THE RETARDATION AND ENTRAINMENT OF DROPLETS IN A POLYDISPERSE WATER FLOW BY HIGH-TEMPERATURE GASES UNDER CONDITIONS OF INTENSE PHASE TRANSFORMATIONS

The processes of retardation and subsequent entrainment of droplets of size 50–500 μm of a polydisperse water flow by high-temperature (about 1100 K) gases are investigated by means of the "Particle Image Velocimetry" and "Interferometric Particle Imaging" optical methods, cross-correlation cameras, and pulsed lasers. The initial velocities of motion of water droplets and gases varied within the ranges 0.5–5 m/s and 0.5–2.5 m/s. The limiting relationships between the initial velocities and dimensions of droplets at which the conditions for the entrainment of them by a gas countercurrent fl ow are implemented established. A dimensionless criterion for prognostic evaluation of the retardation conditions and of the subsequent entrainment of water droplets by high-temperature gases under analyzed conditions is introduced into consideration.
   
Author:  R. S. Volkov, G. V. Kuznetsov, and P. A. Strizhak
Keywords:  water, droplets, polydisperse dropping liquid fl ow, high-temperature gases, phase transformations, entrainment
Page:  937