Experimental study on temperature fluctuations on plate surface induced by coaxial-jet flow

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Xue Yao Xiong
  • Zun Quan Liu
  • Guo Yan Zhou
  • Xing Luo
  • Shan Tung Tu

Research Organisations

External Research Organisations

  • East China University of Science and Technology
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Details

Original languageEnglish
Article number41
Number of pages15
JournalNuclear science and techniques
Volume35
Issue number5
Early online date9 Apr 2024
Publication statusPublished - May 2024

Abstract

In nuclear reactors, temperature fluctuations of fluids may cause fatigue damage to adjacent structures; this is referred to as thermal striping. Research on thermal striping in the upper plenum has mainly focused on fluid fields. Few experimental studies have been reported on solid structures in a fluid field with a coaxial jet. This study entailed an experimental study of the temperature fluctuations in the fluid and on a plate surface caused by a coaxial jet. The temperature fluctuations of the fluid and plate surfaces located at different heights were analyzed. The cause of the temperature fluctuation was analyzed using a transient temperature distribution. The results show that the mixing of the hot and cold fluids gradually becomes uniform in the positive axial direction. The average surface temperatures tended to be consistent. When the jet reaches the plate surface, the swing of the jet center, contraction and expansion of the cold jet, and changes in the jet shape result in temperature fluctuations. The intensity of the temperature fluctuation was affected by the position. More attention should be paid when the plate is located at a lower height, and between the hot and cold-fluid nozzles.

Keywords

    Coaxial jet, Temperature fluctuation, The upper plenum of nuclear reactor, Thermal mixing, Thermal striping

ASJC Scopus subject areas

Cite this

Experimental study on temperature fluctuations on plate surface induced by coaxial-jet flow. / Xiong, Xue Yao; Liu, Zun Quan; Zhou, Guo Yan et al.
In: Nuclear science and techniques, Vol. 35, No. 5, 41, 05.2024.

Research output: Contribution to journalArticleResearchpeer review

Xiong XY, Liu ZQ, Zhou GY, Luo X, Tu ST. Experimental study on temperature fluctuations on plate surface induced by coaxial-jet flow. Nuclear science and techniques. 2024 May;35(5):41. Epub 2024 Apr 9. doi: 10.1007/s41365-024-01402-8
Xiong, Xue Yao ; Liu, Zun Quan ; Zhou, Guo Yan et al. / Experimental study on temperature fluctuations on plate surface induced by coaxial-jet flow. In: Nuclear science and techniques. 2024 ; Vol. 35, No. 5.
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abstract = "In nuclear reactors, temperature fluctuations of fluids may cause fatigue damage to adjacent structures; this is referred to as thermal striping. Research on thermal striping in the upper plenum has mainly focused on fluid fields. Few experimental studies have been reported on solid structures in a fluid field with a coaxial jet. This study entailed an experimental study of the temperature fluctuations in the fluid and on a plate surface caused by a coaxial jet. The temperature fluctuations of the fluid and plate surfaces located at different heights were analyzed. The cause of the temperature fluctuation was analyzed using a transient temperature distribution. The results show that the mixing of the hot and cold fluids gradually becomes uniform in the positive axial direction. The average surface temperatures tended to be consistent. When the jet reaches the plate surface, the swing of the jet center, contraction and expansion of the cold jet, and changes in the jet shape result in temperature fluctuations. The intensity of the temperature fluctuation was affected by the position. More attention should be paid when the plate is located at a lower height, and between the hot and cold-fluid nozzles.",
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author = "Xiong, {Xue Yao} and Liu, {Zun Quan} and Zhou, {Guo Yan} and Xing Luo and Tu, {Shan Tung}",
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AU - Xiong, Xue Yao

AU - Liu, Zun Quan

AU - Zhou, Guo Yan

AU - Luo, Xing

AU - Tu, Shan Tung

N1 - This work was supported by the National Natural Science Foundation of China (No. 52075173) and the Overseas Expertise Introduction Project for Discipline Innovation (No. B13020).

PY - 2024/5

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N2 - In nuclear reactors, temperature fluctuations of fluids may cause fatigue damage to adjacent structures; this is referred to as thermal striping. Research on thermal striping in the upper plenum has mainly focused on fluid fields. Few experimental studies have been reported on solid structures in a fluid field with a coaxial jet. This study entailed an experimental study of the temperature fluctuations in the fluid and on a plate surface caused by a coaxial jet. The temperature fluctuations of the fluid and plate surfaces located at different heights were analyzed. The cause of the temperature fluctuation was analyzed using a transient temperature distribution. The results show that the mixing of the hot and cold fluids gradually becomes uniform in the positive axial direction. The average surface temperatures tended to be consistent. When the jet reaches the plate surface, the swing of the jet center, contraction and expansion of the cold jet, and changes in the jet shape result in temperature fluctuations. The intensity of the temperature fluctuation was affected by the position. More attention should be paid when the plate is located at a lower height, and between the hot and cold-fluid nozzles.

AB - In nuclear reactors, temperature fluctuations of fluids may cause fatigue damage to adjacent structures; this is referred to as thermal striping. Research on thermal striping in the upper plenum has mainly focused on fluid fields. Few experimental studies have been reported on solid structures in a fluid field with a coaxial jet. This study entailed an experimental study of the temperature fluctuations in the fluid and on a plate surface caused by a coaxial jet. The temperature fluctuations of the fluid and plate surfaces located at different heights were analyzed. The cause of the temperature fluctuation was analyzed using a transient temperature distribution. The results show that the mixing of the hot and cold fluids gradually becomes uniform in the positive axial direction. The average surface temperatures tended to be consistent. When the jet reaches the plate surface, the swing of the jet center, contraction and expansion of the cold jet, and changes in the jet shape result in temperature fluctuations. The intensity of the temperature fluctuation was affected by the position. More attention should be paid when the plate is located at a lower height, and between the hot and cold-fluid nozzles.

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KW - Temperature fluctuation

KW - The upper plenum of nuclear reactor

KW - Thermal mixing

KW - Thermal striping

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