2个3 × 3杆束通道气-水周期性驱流特性及形成机理研究

IF 2.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Annals of Nuclear Energy Pub Date : 2025-07-03 DOI:10.1016/j.anucene.2025.111706

Guangyuan Jin , Weilian Li , Jinghu Bai , Rui Wang

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引用次数: 0

摘要

周期性洪水的特征和机理研究对核电厂的应急处理具有重要意义。实验研究了两个杆束通道的泛水现象、不同泛水区域的持续时间、受力分析和流动不稳定性。将泛洪区分为起始泛洪区和完成泛洪区。通道1中泛洪区域的平均持续时间大于通道2，因此通道直径越小，波浪越大，存在时间越长，泛洪条件越广。结合作用于液膜的四种力在不同的泛洪区域的作用，解释了周期性泛洪的形成机理。在驱油和反驱区观测到的Kelvin-Helmholtz和Rayleigh-Taylor不稳定性分析了界面不稳定性对不同杆束通道周期性驱油的影响。

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Study on flow characteristics and formation mechanism of air-water periodic flooding in two 3 × 3 rod bundle channels

The research on the characteristics and mechanisms of periodic flooding are important for the emergency treatment of nuclear power plants. Experimental investigations were carried out on the flooding phenomenon, the duration of various flooding regions, force analysis, and flow instability in two rod bundle channels. The flooding region can be divided into the onset flooding region and the completed flooding region. The average duration of flooding regions in Channel 1 is greater than that in Channel 2, so the channel with a smaller diameter provided larger waves, longer existence times, and expanded flooding conditions. Four forces acting on the liquid film are combined in different flooding regions to explain the formation mechanism of periodic flooding. The Kelvin–Helmholtz and Rayleigh-Taylor instabilities observed in the flooding and deflooding regions are shown to analyze the influence of interfacial instability on periodic flooding in different rod bundle channels.

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来源期刊

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.