A Study on Thermo-Hydraulic Instability of Boiling Natural Circulation Loop with a Chimeny (2nd Report, Experimental Approach to Clarify the Flow Instability in Detail)

Masahiro Furuya, Fumio Inada, Akira Yasuo

Research output: Contribution to journalArticle

Abstract

Experiments are are conducted to investigate two-phase flow instabilities in a boiling natural circulation loop with a chimney induced by flashing in the chimney at lower pressure. The type of instability that occurred in the experiments is suggested to be density wave oscillations induced by flashing in the chimney. The differences from other instabilities such as geysering, flow pattern transition instability, and natural circulation oscillations are discussed on the basis of the dynamic characteristics, the oscillation period, and the transient flow resume.

Original languageEnglish
Pages (from-to)4074-4080
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume61
Issue number591
DOIs
Publication statusPublished - 1995 Jan 1
Externally publishedYes

Fingerprint

chimneys
hydraulics
boiling
Boiling liquids
Chimneys
Hydraulics
oscillations
two phase flow
Two phase flow
Flow patterns
dynamic characteristics
flow distribution
low pressure
Experiments

Keywords

  • Boiling Two-Phase Flow
  • Density Wave Oscillations
  • Flashing
  • Natural Circulation
  • Thermo-Hydraulic Instability

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

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abstract = "Experiments are are conducted to investigate two-phase flow instabilities in a boiling natural circulation loop with a chimney induced by flashing in the chimney at lower pressure. The type of instability that occurred in the experiments is suggested to be density wave oscillations induced by flashing in the chimney. The differences from other instabilities such as geysering, flow pattern transition instability, and natural circulation oscillations are discussed on the basis of the dynamic characteristics, the oscillation period, and the transient flow resume.",
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AU - Yasuo, Akira

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AB - Experiments are are conducted to investigate two-phase flow instabilities in a boiling natural circulation loop with a chimney induced by flashing in the chimney at lower pressure. The type of instability that occurred in the experiments is suggested to be density wave oscillations induced by flashing in the chimney. The differences from other instabilities such as geysering, flow pattern transition instability, and natural circulation oscillations are discussed on the basis of the dynamic characteristics, the oscillation period, and the transient flow resume.

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