A Dual Conductance Sensor for Simultaneous Measurement of Void Fractionand Structure Velocity of Downward Two-Phase Flow in a Slightly InclinedPipe

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/473571.do
DOI
10.3390/s17051063
Title
A Dual Conductance Sensor for Simultaneous Measurement of Void Fractionand Structure Velocity of Downward Two-Phase Flow in a Slightly InclinedPipe
Description
This work was supported by the Nuclear R&D Program(NRF-2016M2B2A9911742) and the Priority Research Centers Program(NRF-2010-0020077) through the National Research Foundation of Korea(NRF), funded by the Ministry of Science, ICT and Future Planning (MSIP)and the Ministry of Education (MOE) of the Korean government.
abstract
In this study, a new and improved electrical conductance sensor is proposed for application not only to a horizontal pipe, but also an inclined one. The conductance sensor was designed to have a dual layer, each consisting of a three-electrode set to obtain two instantaneous conductance signals in turns, so that the area-averaged void fraction and structure velocity could be measured simultaneously. The optimum configuration of the electrodes was determined through numerical analysis, and the calibration curves for stratified and annular flow were obtained through a series of static experiments. The fabricated conductance sensor was applied to a 45 mm inner diameter U-shaped downward inclined pipe with an inclination angle of 3 degrees under adiabatic air-water flow conditions. In the tests, the superficial velocities ranged from 0.1 to 3.0 m/s for water and from 0.1 to 18 m/s for air. The obtained mean void fraction and the structure velocity from the conductance sensor were validated against the measurement by the wire-mesh sensor and the cross-correlation technique for the visualized images, respectively. The results of the flow regime classification and the corresponding time series of the void fraction at a variety of flow velocities were also discussed.
provenance
Made available in Cube on 2018-09-28T10:23:11Z (GMT). No. of bitstreams: 0
language
English
author
Lee, Yeon-Gun
Won, Woo-Youn
Lee, Bo -An
Kim, Sin
orcid
Lee, Yeon-Gun/0000-0001-6023-1589
accessioned
2018-09-28T10:23:11Z
available
2018-09-28T10:23:11Z
issued
2017
citation
SENSORS(17): 5
issn
1424-8220
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/473571.do
Funder
교육부
Funding Program
BK21플러스사업(0.5)
Project ID
1345273959
Jurisdiction
Rep.of Korea
Project Name
Clean Energy Convergence and Integration Center for Human Resources Training and Education
rights
openAccess
subject
dual conductance sensor
inclined pipe
void fraction
structurevelocity
flow regime
type
article


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