Experimentally determining the sizes of water flow droplets entrained by high-temperature gases

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3 Citations (Scopus)

Abstract

Regularities pertinent to counter mixing of the flows of high-temperature (1000 K) gases and water (with the characteristic droplet sizes from 0.05 to 0.5 mm) are experimentally investigated using high- speed (10<sup>5</sup> snapshots per second) cross-correlation video recording equipment and panoramic optic digital “tracer” visualization methods (called the Particle Image Velocimetry and Interferometric Particle Imaging techniiques). The sizes of droplets entrained by high-temperature gases and their motion velocities acquired after having been mixed with gases (with the gas motion velocities varied in the range of 0.1-2.5 m/s) are established. The initial droplet motion velocities were varied from 0.5 to 5.0 m/s. Two characteristic water droplet motion modes in the counter flow of high-temperature gases under the conditions of intense phase transformations were established. It is demonstrated that the droplet motion pattern in the counter flow of high-temperature gases, as well as the droplet evaporation intensity depend in the main on the initial sizes of liquid droplets. The integral dependence Re<inf>dr</inf> = f(Re<inf>g</inf>) using which it is possible to predict the droplet motion modes and trajectories, as well as phase transformation intensity with the a priori known droplet sizes and steam–droplet and gas flow velocities is obtained.

Original languageEnglish
Article numberA008
Pages (from-to)586-592
Number of pages7
JournalThermal Engineering (English translation of Teploenergetika)
Volume62
Issue number8
DOIs
Publication statusPublished - 2015

Fingerprint

Flow of water
Gases
Temperature
Phase transitions
Video recording
Flow velocity
Velocity measurement
Flow of gases
Water
Optics
Evaporation
Visualization
Trajectories
Imaging techniques
Liquids

Keywords

  • Droplets
  • Entrainment
  • Evaporation
  • High-temperature gases
  • Panoramic optical methods
  • Polydisperse water flow

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering

Cite this

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title = "Experimentally determining the sizes of water flow droplets entrained by high-temperature gases",
abstract = "Regularities pertinent to counter mixing of the flows of high-temperature (1000 K) gases and water (with the characteristic droplet sizes from 0.05 to 0.5 mm) are experimentally investigated using high- speed (105 snapshots per second) cross-correlation video recording equipment and panoramic optic digital “tracer” visualization methods (called the Particle Image Velocimetry and Interferometric Particle Imaging techniiques). The sizes of droplets entrained by high-temperature gases and their motion velocities acquired after having been mixed with gases (with the gas motion velocities varied in the range of 0.1-2.5 m/s) are established. The initial droplet motion velocities were varied from 0.5 to 5.0 m/s. Two characteristic water droplet motion modes in the counter flow of high-temperature gases under the conditions of intense phase transformations were established. It is demonstrated that the droplet motion pattern in the counter flow of high-temperature gases, as well as the droplet evaporation intensity depend in the main on the initial sizes of liquid droplets. The integral dependence Redr = f(Reg) using which it is possible to predict the droplet motion modes and trajectories, as well as phase transformation intensity with the a priori known droplet sizes and steam–droplet and gas flow velocities is obtained.",
keywords = "Droplets, Entrainment, Evaporation, High-temperature gases, Panoramic optical methods, Polydisperse water flow",
author = "Volkov, {R. S.} and Alena Olegovna Zhdanova and Kuznetsov, {G. V.} and Strizhak, {P. A.}",
year = "2015",
doi = "10.1134/S0040601515080091",
language = "English",
volume = "62",
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T1 - Experimentally determining the sizes of water flow droplets entrained by high-temperature gases

AU - Volkov, R. S.

AU - Zhdanova, Alena Olegovna

AU - Kuznetsov, G. V.

AU - Strizhak, P. A.

PY - 2015

Y1 - 2015

N2 - Regularities pertinent to counter mixing of the flows of high-temperature (1000 K) gases and water (with the characteristic droplet sizes from 0.05 to 0.5 mm) are experimentally investigated using high- speed (105 snapshots per second) cross-correlation video recording equipment and panoramic optic digital “tracer” visualization methods (called the Particle Image Velocimetry and Interferometric Particle Imaging techniiques). The sizes of droplets entrained by high-temperature gases and their motion velocities acquired after having been mixed with gases (with the gas motion velocities varied in the range of 0.1-2.5 m/s) are established. The initial droplet motion velocities were varied from 0.5 to 5.0 m/s. Two characteristic water droplet motion modes in the counter flow of high-temperature gases under the conditions of intense phase transformations were established. It is demonstrated that the droplet motion pattern in the counter flow of high-temperature gases, as well as the droplet evaporation intensity depend in the main on the initial sizes of liquid droplets. The integral dependence Redr = f(Reg) using which it is possible to predict the droplet motion modes and trajectories, as well as phase transformation intensity with the a priori known droplet sizes and steam–droplet and gas flow velocities is obtained.

AB - Regularities pertinent to counter mixing of the flows of high-temperature (1000 K) gases and water (with the characteristic droplet sizes from 0.05 to 0.5 mm) are experimentally investigated using high- speed (105 snapshots per second) cross-correlation video recording equipment and panoramic optic digital “tracer” visualization methods (called the Particle Image Velocimetry and Interferometric Particle Imaging techniiques). The sizes of droplets entrained by high-temperature gases and their motion velocities acquired after having been mixed with gases (with the gas motion velocities varied in the range of 0.1-2.5 m/s) are established. The initial droplet motion velocities were varied from 0.5 to 5.0 m/s. Two characteristic water droplet motion modes in the counter flow of high-temperature gases under the conditions of intense phase transformations were established. It is demonstrated that the droplet motion pattern in the counter flow of high-temperature gases, as well as the droplet evaporation intensity depend in the main on the initial sizes of liquid droplets. The integral dependence Redr = f(Reg) using which it is possible to predict the droplet motion modes and trajectories, as well as phase transformation intensity with the a priori known droplet sizes and steam–droplet and gas flow velocities is obtained.

KW - Droplets

KW - Entrainment

KW - Evaporation

KW - High-temperature gases

KW - Panoramic optical methods

KW - Polydisperse water flow

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