Minimum heat flux point and liquid-solid contact during rapid quenching of thin wires

Hiroshi Honda, Hiroshi Takamatsu, Hikaru Yamashiro

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

Rapid quenching of thin horizontal platinum wires falling at a constant speed was studied experimentally with pure water and ethanol as quenching liquids. The transient boiling curve obtained from the cooling curve had two local minimum-heat-flux points. M1 and M2. Measurement of the liquid-solid contact and observation of the boiling pattern showed that a marked liquid-solid contact began at the first (higher wall superheat) minimum-heat-flux point, M1. The heat transfer results indicated that the M1 point corresponded to the minimum vapor film thickness for stable film boiling. The effects of liquid subcooling and falling velocity on the average vapor film thickness and the wall superheat at the M1 point were clarified. The wall superheat at the M2 point was almost constant for each liquid irrespective of liquid subcooling and falling velocity.

元の言語英語
ページ(範囲)208-215
ページ数8
ジャーナルNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
61
発行部数592
出版物ステータス出版済み - 12 1995

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Rapid quenching
Contacts (fluid mechanics)
Heat flux
heat flux
wire
Wire
Liquids
liquids
falling
Boiling liquids
boiling
Film thickness
film thickness
Vapors
vapors
film boiling
curves
Platinum
Quenching
platinum

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

これを引用

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abstract = "Rapid quenching of thin horizontal platinum wires falling at a constant speed was studied experimentally with pure water and ethanol as quenching liquids. The transient boiling curve obtained from the cooling curve had two local minimum-heat-flux points. M1 and M2. Measurement of the liquid-solid contact and observation of the boiling pattern showed that a marked liquid-solid contact began at the first (higher wall superheat) minimum-heat-flux point, M1. The heat transfer results indicated that the M1 point corresponded to the minimum vapor film thickness for stable film boiling. The effects of liquid subcooling and falling velocity on the average vapor film thickness and the wall superheat at the M1 point were clarified. The wall superheat at the M2 point was almost constant for each liquid irrespective of liquid subcooling and falling velocity.",
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AU - Takamatsu, Hiroshi

AU - Yamashiro, Hikaru

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AB - Rapid quenching of thin horizontal platinum wires falling at a constant speed was studied experimentally with pure water and ethanol as quenching liquids. The transient boiling curve obtained from the cooling curve had two local minimum-heat-flux points. M1 and M2. Measurement of the liquid-solid contact and observation of the boiling pattern showed that a marked liquid-solid contact began at the first (higher wall superheat) minimum-heat-flux point, M1. The heat transfer results indicated that the M1 point corresponded to the minimum vapor film thickness for stable film boiling. The effects of liquid subcooling and falling velocity on the average vapor film thickness and the wall superheat at the M1 point were clarified. The wall superheat at the M2 point was almost constant for each liquid irrespective of liquid subcooling and falling velocity.

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