Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Quantitative observation of co-current stratified two-phase flow in a horizontal rectangular channel

  • Lee, Seungtae (Department of Advanced Nuclear System Engineering, Korea University of Science & Technology (KUST)) ;
  • Euh, Dong-Jin (Department of Advanced Nuclear System Engineering, Korea University of Science & Technology (KUST)) ;
  • Kim, Seok (Thermal Hydraulics Safety Research Division, Korea Atomic Energy Research Institute (KAERI)) ;
  • Song, Chul-Hwa (Department of Advanced Nuclear System Engineering, Korea University of Science & Technology (KUST))
  • Received : 2014.09.19
  • Accepted : 2014.11.17
  • Published : 2015.04.25
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Abstract

The main objective of this study is to investigate experimentally the two-phase flow characteristics in terms of the direct contact condensation of a steam-water stratified flow in a horizontal rectangular channel. Experiments were performed for both air-water and steam-water flows with a cocurrent flow configuration. This work presents the local temperature and velocity distributions in a water layer as well as the interfacial characteristics of both condensing and noncondensing fluid flows. The gas superficial velocity varied from 1.2 m/s to 2.0 m/s for air and from 1.2 m/s to 2.8 m/s for steam under a fixed inlet water superficial velocity of 0.025 m/s. Some advanced measurement methods have been applied to measure the local characteristics of the water layer thickness, temperature, and velocity fields in a horizontal stratified flow. The instantaneous velocity and temperature fields inside the water layer were measured using laser-induced fluorescence and particle image velocimetry, respectively. In addition, the water layer thickness was measured through an ultrasonic method.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea

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