Interfacial behaviors, kinetic analysis and dynamic parameters of disturbance waves in 3 × 3 rod bundle channels

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

Progress in Nuclear Energy Pub Date : 2025-03-12 DOI:10.1016/j.pnucene.2025.105727

Guangyuan Jin, Jinghu Bai, Weilian Li, Hongye He, Yandong Hou

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引用次数: 0

Abstract

To facilitate operational monitoring and accident management in various nuclear power plants, it is essential to investigate the interfacial behaviors, parameter characteristics, and formation mechanisms of annular flow in rod bundle channels. A visual experimental system was developed to record and classify the interfacial behaviors of disturbance waves on side and corner rods. The results indicated that the disturbance waves can be categorized into Small-scale waves, Bag-crest waves, and Ligament-crest waves. The flow map of the two channels indicated that wave structures with lower heights in Channel-1 appeared earlier when the liquid phase velocity remained constant. The peak values in the Power Spectral Density (PSD) results reflect the type and energy of various waves. The highest peak value gradually increases as the wave structure transitions from SS, BC, LC to LC-ll waves. The increasing texture lines with the highest values in the RP results indicate a distinct periodicity of BC waves. Furthermore, the periodicity of BC waves is more pronounced on the corner rod than on the side rod. The MPE value increases as wave types change from Small-scale to Single-crest waves. Additionally, the value of liquid film thickness are generally higher than that of pressure drop. The wave height, velocity, and frequency under different flow conditions were presented and compared. The results indicated that variations in dynamic parameters are closely related to the characteristics of disturbance wave structures.

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3 × 3棒束通道中扰动波的界面行为、动力学分析及动力学参数

为了便于各种核电站的运行监测和事故管理，有必要研究棒束通道内环空流动的界面行为、参数特征和形成机制。开发了一种视觉实验系统，用于记录和分类干扰波在侧杆和角杆上的界面行为。结果表明，扰动波可分为小尺度波、袋峰波和韧带峰波。两个通道的流动图表明，当液相速度保持不变时，通道1中出现高度较低的波结构较早。功率谱密度（PSD）结果中的峰值反映了各种波的类型和能量。随着波结构从SS、BC、LC向LC-ll波过渡，峰值逐渐增大。RP结果中值最高的纹理线越长，表明BC波具有明显的周期性。此外，BC波的周期性在角杆上比在侧杆上更明显。MPE值随波型由小波型向单波峰型转变而增大。此外，液膜厚度值一般高于压降值。给出了不同流动条件下的波高、速度和频率，并进行了比较。结果表明，动力参数的变化与扰动波结构的特性密切相关。

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.