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

doi:10.1299/kikaib.66.650_2704

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 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. 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 language	English
Pages (from-to)	2704-2711
Number of pages	8
Journal	Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	66
Issue number	650
DOIs	https://doi.org/10.1299/kikaib.66.650_2704
Publication status	Published - Oct 2000
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanical Engineering

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10.1299/kikaib.66.650_2704

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Fukano, T., Akamatsu, S., Baba, A., Okusako, T., & Mori, S. (2000). 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. Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, 66(650), 2704-2711. https://doi.org/10.1299/kikaib.66.650_2704

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. / Fukano, Tohru; Akamatsu, Shizu; Baba, Atsushi et al.
In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 66, No. 650, 10.2000, p. 2704-2711.

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

Fukano, T, Akamatsu, S, Baba, A, Okusako, T & Mori, S 2000, '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', Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, vol. 66, no. 650, pp. 2704-2711. https://doi.org/10.1299/kikaib.66.650_2704

Fukano T, Akamatsu S, Baba A, Okusako T, Mori S. 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. Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B. 2000 Oct;66(650):2704-2711. doi: 10.1299/kikaib.66.650_2704

Fukano, Tohru ; Akamatsu, Shizu ; Baba, Atsushi et al. / 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. In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B. 2000 ; Vol. 66, No. 650. pp. 2704-2711.

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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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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

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