Relation between temperature fluctuation of a heating surface and generation of drypatch caused by a spacer in a vertical boiling two-phase flow in a narrow annular channel

Tohru Fukano, Shizu Akamatsu, Atsushi Baba, Takashi Okusako, Shoji Mori

Research output: Contribution to journalArticle

Abstract

If a flow obstruction such as a spacer is set in a boiling two-phase flow within an annular channel, the inner tube of which is used as a heater, the temperature on the surface of the heater tube is severely affected by the existence of the spacer. In some case the spacer has a cooling effect, and in the other case it causes the dryout of the cooling liquid film on the heating surface resulting in the burnout of the tube. In the present paper we discuss the temperature distributions near the spacer and its fluctuation characteristics in relation to the change of the flow configuration near the spacer.

Original languageEnglish
Pages (from-to)2704-2711
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume66
Issue number650
DOIs
Publication statusPublished - Jan 1 2000
Externally publishedYes

Fingerprint

two phase flow
Two phase flow
boiling
spacers
Boiling liquids
Cooling
Heating
heating
Liquid films
tubes
Temperature distribution
heaters
Temperature
temperature
burnout
liquid cooling
temperature distribution
cooling
causes
configurations

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

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T1 - Relation between temperature fluctuation of a heating surface and generation of drypatch caused by a spacer in a vertical boiling two-phase flow in a narrow annular channel

AU - Fukano, Tohru

AU - Akamatsu, Shizu

AU - Baba, Atsushi

AU - Okusako, Takashi

AU - Mori, Shoji

PY - 2000/1/1

Y1 - 2000/1/1

N2 - If a flow obstruction such as a spacer is set in a boiling two-phase flow within an annular channel, the inner tube of which is used as a heater, the temperature on the surface of the heater tube is severely affected by the existence of the spacer. In some case the spacer has a cooling effect, and in the other case it causes the dryout of the cooling liquid film on the heating surface resulting in the burnout of the tube. In the present paper we discuss the temperature distributions near the spacer and its fluctuation characteristics in relation to the change of the flow configuration near the spacer.

AB - If a flow obstruction such as a spacer is set in a boiling two-phase flow within an annular channel, the inner tube of which is used as a heater, the temperature on the surface of the heater tube is severely affected by the existence of the spacer. In some case the spacer has a cooling effect, and in the other case it causes the dryout of the cooling liquid film on the heating surface resulting in the burnout of the tube. In the present paper we discuss the temperature distributions near the spacer and its fluctuation characteristics in relation to the change of the flow configuration near the spacer.

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