Experimental study and software simulation of air-water periodic flooding in a 3×3 bundle channel

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

Progress in Nuclear Energy Pub Date : 2026-04-01 Epub Date: 2026-01-15 DOI:10.1016/j.pnucene.2026.106262

Guangyuan Jin , Weilian Li , Jinghu Bai , Rui Wang , Yandong Hou

{"title":"Experimental study and software simulation of air-water periodic flooding in a 3×3 bundle channel","authors":"Guangyuan Jin , Weilian Li , Jinghu Bai , Rui Wang , Yandong Hou","doi":"10.1016/j.pnucene.2026.106262","DOIUrl":null,"url":null,"abstract":"<div><div>Investigating the behavior of gas-liquid two-phase flow within rod bundle channels can provide theoretical support for the smooth operation and emergency response of reactor systems. The characteristics of flow in a 3 × 3 rod bundle channel under periodic flooding conditions were investigated using numerical simulation methods. Comparing the simulation results with the experimental data revealed a high degree of agreement in the gas-liquid behavior and the time fractions across different flooding regions. This study examines the evolution of the void fraction along the axial direction and the variation of liquid phase velocity within the subchannels. The study of the local liquid phase velocity field analyzes the mechanisms underlying the onset of the flooding front and the formation of liquid phase accumulation. The relationship between the dimensionless pressure gradient and liquid holdup was analyzed, and an examination of the force conditions on the liquid film led to the conclusion that periodic flooding results from the alternating effects of the gas phase's carrying force and the gravity of the liquid phase in different regions. These research findings further enhance the understanding of thermal-hydraulic characteristics within rod bundle channels.</div></div>","PeriodicalId":20617,"journal":{"name":"Progress in Nuclear Energy","volume":"194 ","pages":"Article 106262"},"PeriodicalIF":3.2000,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Progress in Nuclear Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0149197026000272","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/1/15 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Investigating the behavior of gas-liquid two-phase flow within rod bundle channels can provide theoretical support for the smooth operation and emergency response of reactor systems. The characteristics of flow in a 3 × 3 rod bundle channel under periodic flooding conditions were investigated using numerical simulation methods. Comparing the simulation results with the experimental data revealed a high degree of agreement in the gas-liquid behavior and the time fractions across different flooding regions. This study examines the evolution of the void fraction along the axial direction and the variation of liquid phase velocity within the subchannels. The study of the local liquid phase velocity field analyzes the mechanisms underlying the onset of the flooding front and the formation of liquid phase accumulation. The relationship between the dimensionless pressure gradient and liquid holdup was analyzed, and an examination of the force conditions on the liquid film led to the conclusion that periodic flooding results from the alternating effects of the gas phase's carrying force and the gravity of the liquid phase in different regions. These research findings further enhance the understanding of thermal-hydraulic characteristics within rod bundle channels.

查看原文本刊更多论文

3×3束状通道气-水周期性注水试验研究及软件模拟

研究棒束通道内气液两相流动特性可以为反应堆系统的平稳运行和应急响应提供理论支持。采用数值模拟的方法研究了周期性注水条件下3 × 3杆束通道内的流动特性。将模拟结果与实验数据进行比较，发现不同驱油区域的气液行为和时间分数高度一致。本研究考察了孔隙率沿轴向的演化和子通道内液相速度的变化。局部液相速度场的研究分析了洪水锋面发生和液相堆积形成的机理。分析了无量纲压力梯度与液含率之间的关系，并对液膜受力条件进行了考察，得出了气相携载力和液相重力在不同区域交替作用的结论。这些研究结果进一步加深了对杆束通道热水力特性的认识。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.