A study on thermo-hydraulic instability of boiling natural circulation loop with a chimney (4th report, an analytical consideration of the stability and thermo-hydraulic characteristics in the chimney in high pressure)

Fumio Inada*, Masahiro Furuya, Akira Yasuo

*この研究の対応する著者

研究成果: Article査読

抄録

Thermo-hydraulic instabilities of a boiling natural circulation loop with a chimney under high pressure were investigated using linear stability analysis. Drift-flux model was used for two-phase flow model. The instability regions as well as the thermo-hydraulic characteristics in the chimney such as wavy feature were examined, which were compared with the characteristics in low pressure. Instability could occur when exit quality was relatively low, which was the same manner as the characteristics in low pressure. In high-pressure, void was generated near channel exit, and void wave propagated in the chimney. In low pressure, steam was generated only near the chimney exit due to gravity induced flashing, and single-phase enthalpy wave, that is, temperature wave propagated in single-phase flow region. Though flow could be very stable in the high pressure and high power condition, the decay ratio of higher mode could be larger than that of lower mode.

本文言語English
ページ(範囲)511-518
ページ数8
ジャーナルNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
68
666
DOI
出版ステータスPublished - 2002 2月
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 機械工学

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