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

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Abstract

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 flow 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.

Original languageEnglish
Pages (from-to)937-947
Number of pages11
JournalJournal of Engineering Physics and Thermophysics
Volume88
Issue number4
DOIs
Publication statusPublished - 1 Jul 2015

Keywords

  • droplets
  • entrainment
  • high-temperature gases
  • phase transformations
  • polydisperse dropping liquid flow
  • water

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)

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