Experimental study on bubble dynamics in narrow rectangular blistering channels – part Ⅱ: Bubble departure

IF 3.2 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Progress in Nuclear Energy Pub Date : 2025-08-16 DOI:10.1016/j.pnucene.2025.105992

Kexin Liu , Tianzhou Xie , Ming Ding , Xiaxin Cao , Jianjun Xu

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引用次数: 0

Abstract

After the cladding blister of the plate-shaped fuel element occurs, the bubble dynamics in the coolant channel will change, thereby affecting the thermal and hydraulic characteristics of the reactor core. Currently, there is almost no research on bubble dynamics within narrow rectangular blistering channels. As part Ⅱ of the submitted article, this article obtained experimental data on bubble departure diameter and bubble departure frequency based on visualization experiments of narrow rectangular blistering channels. The departure characteristics of rapid condensation bubbles and sliding bubbles were analyzed separately. The geometric structure and thermal parameters were analyzed for their effects on bubble departure diameter and bubble departure frequency. Based on the current experimental data, the existing empirical correlations were evaluated, and it was found that they cannot accurately predict the bubble departure characteristics under blister conditions. The new correlations were proposed for bubble departure diameter and bubble departure frequency applicable to narrow rectangular blistering channels. The predictive ability of new correlations is superior to existing correlations. The accurate modification of the wall boiling model based on the blistering experimental mechanism and new empirical correlations is the direction of future work.

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窄矩形起泡通道中气泡动力学的实验研究-部分Ⅱ：气泡偏离

板状燃料元件包壳起泡后，冷却剂通道内气泡动力学会发生变化，从而影响堆芯的热特性和水力特性。目前，关于窄矩形泡化通道内气泡动力学的研究几乎没有。作为已提交文章Ⅱ的一部分，本文通过矩形窄泡化通道的可视化实验，获得了气泡偏离直径和气泡偏离频率的实验数据。分别分析了快速凝结气泡和滑动气泡的离开特性。分析了几何结构和热参数对气泡偏离直径和气泡偏离频率的影响。在现有实验数据的基础上，对已有的经验相关性进行了评估，发现它们不能准确预测起泡条件下的气泡偏离特性。提出了适用于窄矩形起泡通道的气泡偏离直径和气泡偏离频率的新关系式。新相关性的预测能力优于已有相关性。基于起泡实验机理和新的经验关联对壁面沸腾模型进行精确修正是今后工作的方向。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Progress in Nuclear Energy 工程技术-核科学技术

CiteScore

5.30

自引率

14.80%

发文量

331

审稿时长

3.5 months

期刊介绍： Progress in Nuclear Energy is an international review journal covering all aspects of nuclear science and engineering. In keeping with the maturity of nuclear power, articles on safety, siting and environmental problems are encouraged, as are those associated with economics and fuel management. However, basic physics and engineering will remain an important aspect of the editorial policy. Articles published are either of a review nature or present new material in more depth. They are aimed at researchers and technically-oriented managers working in the nuclear energy field. Please note the following: 1) PNE seeks high quality research papers which are medium to long in length. Short research papers should be submitted to the journal Annals in Nuclear Energy. 2) PNE reserves the right to reject papers which are based solely on routine application of computer codes used to produce reactor designs or explain existing reactor phenomena. Such papers, although worthy, are best left as laboratory reports whereas Progress in Nuclear Energy seeks papers of originality, which are archival in nature, in the fields of mathematical and experimental nuclear technology, including fission, fusion (blanket physics, radiation damage), safety, materials aspects, economics, etc. 3) Review papers, which may occasionally be invited, are particularly sought by the journal in these fields.