Experiment of adiabatic two-phase flow in an annulus under low-frequency vibration

Shao Wen Chen, Caleb Brooks, Chris Macke, Takashi Hibiki, Mamoru Ishii, Michitsugu Mori

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to investigate the possible effect of seismic vibration on two-phase flow dynamics and thermal-hydraulics of a nuclear reactor, experimental tests of adiabatic air-water two-phase flow under low-frequency vibration were carried out in this study. An eccentric cam vibration module operated at low motor speed (up to 390rpm) was attached to an annulus test section which was scaled down from a prototypic BWR fuel assembly sub-channel. The inner and outer diameters of the annulus are 19.1mm and 38.1mm, respectively. The two-phase flow operating conditions cover the ranges of 0.03≤<jg> ≤1.46m/s and 0.25≤<jf>≤ 1.00m/s and the vibration displacement ranges from ±0.8mm to ±22.2mm. Steady-state area-averaged instantaneous and time-averaged void fraction was recorded and analyzed in stationary and vibration experiments. A neural network flow regime identification technique and fast Fourier transformation (FFT) analysis were introduced to analyze the flow regimes and void signals under stationary and vibration conditions. Experimental results reveal possible changes in flow regimes under specific flow and vibration conditions. In addition, the instantaneous void fraction signals were affected and shown by FFT analysis. Possible reasons for the changes include the applied high acceleration and/or induced resonance at certain ports under the specific flow and vibration conditions.

Original languageEnglish (US)
Title of host publication2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference, ICONE 2012-POWER 2012
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages467-476
Number of pages10
Edition1
ISBN (Print)9780791844977
DOIs
StatePublished - Jan 1 2012
Externally publishedYes
Event2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference, ICONE 2012-POWER 2012 - Anaheim, CA, United States
Duration: Jul 30 2012Aug 3 2012

Publication series

NameInternational Conference on Nuclear Engineering, Proceedings, ICONE
Number1
Volume3

Other

Other2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference, ICONE 2012-POWER 2012
CountryUnited States
CityAnaheim, CA
Period7/30/128/3/12

ASJC Scopus subject areas

  • Nuclear Energy and Engineering

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