Influence of a flow obstacle on the generation of burnout in boiling two-phase upward flow within a vertical annular channel

Shoji Mori; Tohru Fukano; Kentaro Maeda

doi:10.1299/kikaib.68.527

Influence of a flow obstacle on the generation of burnout in boiling two-phase upward flow within a vertical annular channel

Shoji Mori, Tohru Fukano, Kentaro Maeda

Research output: Contribution to journal › Article › peer-review

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. But the burnout mechanism near the spacer is not still clear. In the present paper we discuss temperature fluctuation characteristics in relation to the change of the flow configuration near the spacer in boiling two-phase flow when burnout occurs.

Original language	English
Pages (from-to)	527-535
Number of pages	9
Journal	Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	68
Issue number	666
DOIs	https://doi.org/10.1299/kikaib.68.527
Publication status	Published - Feb 2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanical Engineering

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10.1299/kikaib.68.527

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Influence of a flow obstacle on the generation of burnout in boiling two-phase upward flow within a vertical annular channel. / Mori, Shoji; Fukano, Tohru; Maeda, Kentaro.

In: Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 68, No. 666, 02.2002, p. 527-535.

Research output: Contribution to journal › Article › peer-review

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title = "Influence of a flow obstacle on the generation of burnout in boiling two-phase upward flow within a vertical annular channel",

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. But the burnout mechanism near the spacer is not still clear. In the present paper we discuss temperature fluctuation characteristics in relation to the change of the flow configuration near the spacer in boiling two-phase flow when burnout occurs.",

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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. But the burnout mechanism near the spacer is not still clear. In the present paper we discuss temperature fluctuation characteristics in relation to the change of the flow configuration near the spacer in boiling two-phase flow when burnout occurs.

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. But the burnout mechanism near the spacer is not still clear. In the present paper we discuss temperature fluctuation characteristics in relation to the change of the flow configuration near the spacer in boiling two-phase flow when burnout occurs.

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Influence of a flow obstacle on the generation of burnout in boiling two-phase upward flow within a vertical annular channel

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