Flashing-induced density wave oscillations in a boiling natural circulation system

Masahiro Furuya*

*この研究の対応する著者

研究成果

抄録

This chapter addresses characteristics of flashing-induced density wave oscillations on the basis of the experimental results in a boiling natural circulation system with an adiabatic chimney. Flashing is caused by the sudden increase of vapor generation due to the reduction in hydrostatic head, since saturation enthalpy changes with pressure. Flashing-induced density wave oscillations may, therefore, occur at low pressure. The oscillation period correlates well with the passing time of bubbles in the chimney section regardless of the system pressure, the heat flux, and the inlet subcooling. According to the stability map, the flow became stable below a certain heat flux regardless of the channel inlet subcooling. The stable region enlarged with increasing system pressure. Therefore, the stability margin becomes larger by pressurizing the loop sufficiently before heating.

本文言語English
ホスト出版物のタイトルAdvances in Multiphase Flow and Heat Transfer
出版社Bentham Science Publishers B.V.
ページ280-299
ページ数20
DOI
出版ステータスPublished - 2018
外部発表はい

出版物シリーズ

名前Advances in Multiphase Flow and Heat Transfer
3
ISSN(電子版)1879-4467

ASJC Scopus subject areas

  • 流体および伝熱

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