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Title: Velocity and void distribution in a counter-current two-phase flow

Abstract

Different flow regimes were investigated in a horizontal channel. Simulating a hot leg injection in case of a loss of coolant accident or flow conditions in reflux condenser mode, the hydraulic jump and partially reversed flow were identified as major constraints for a high amount of entrained water. Trying to simulate the reflux condenser mode, the test section now includes an inclined section connected to a horizontal channel. The channel is 90 mm high and 110 mm wide. Tests were carried out for water and air at ambient pressure and temperature. High speed video-metry was applied to obtain velocities from flow pattern maps of the rising and falling fluid. In the horizontal part of the channel with partially reversed flow the fluid velocities were measured by planar particle image velocimetry. To obtain reliable results for the gaseous phase, this analysis was extended by endoscope measurements. Additionally, a new method based on the optical refraction at the interface between air and water in a back-light was used to obtain time-averaged void fraction. (authors)

Authors:
;  [1];  [2]
  1. Karlsruhe Inst. of Technologies KIT, Inst. for Nuclear and Energy Technologies IKET, Hermann-von-Helmholz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany)
  2. Univ. of Stuttgart, Inst. for Nuclear Technology and Energy Systems IKE, Pfaffenwaldring 31, 70569 Stuttgart (Germany)
Publication Date:
Research Org.:
American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
OSTI Identifier:
22107841
Resource Type:
Conference
Resource Relation:
Conference: ICAPP '12: 2012 International Congress on Advances in Nuclear Power Plants, Chicago, IL (United States), 24-28 Jun 2012; Other Information: Country of input: France; 10 refs.; Related Information: In: Proceedings of the 2012 International Congress on Advances in Nuclear Power Plants - ICAPP '12| 2799 p.
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; AIR; COUNTER CURRENT; IMAGES; LOSS OF COOLANT; NUCLEAR POWER PLANTS; SIMULATION; TWO-PHASE FLOW; VELOCITY; VOID FRACTION; VOIDS; WATER

Citation Formats

Gabriel, S., Schulenberg, T., and Laurien, E. Velocity and void distribution in a counter-current two-phase flow. United States: N. p., 2012. Web.
Gabriel, S., Schulenberg, T., & Laurien, E. Velocity and void distribution in a counter-current two-phase flow. United States.
Gabriel, S., Schulenberg, T., and Laurien, E. Sun . "Velocity and void distribution in a counter-current two-phase flow". United States.
@article{osti_22107841,
title = {Velocity and void distribution in a counter-current two-phase flow},
author = {Gabriel, S. and Schulenberg, T. and Laurien, E.},
abstractNote = {Different flow regimes were investigated in a horizontal channel. Simulating a hot leg injection in case of a loss of coolant accident or flow conditions in reflux condenser mode, the hydraulic jump and partially reversed flow were identified as major constraints for a high amount of entrained water. Trying to simulate the reflux condenser mode, the test section now includes an inclined section connected to a horizontal channel. The channel is 90 mm high and 110 mm wide. Tests were carried out for water and air at ambient pressure and temperature. High speed video-metry was applied to obtain velocities from flow pattern maps of the rising and falling fluid. In the horizontal part of the channel with partially reversed flow the fluid velocities were measured by planar particle image velocimetry. To obtain reliable results for the gaseous phase, this analysis was extended by endoscope measurements. Additionally, a new method based on the optical refraction at the interface between air and water in a back-light was used to obtain time-averaged void fraction. (authors)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {7}
}

Conference:
Other availability
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