Numerical investigation on flow and heat transfer of petal-shaped fuel bundle in hexagonal arrangement under natural circulation conditions

IF 3.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY Progress in Nuclear Energy Pub Date : 2024-10-28 DOI:10.1016/j.pnucene.2024.105515

Jinyi Cao , Jianchuang Sun , Xiangfei Meng , Wenchao Zhang , Jincheng Wang , Qian Li , Benan Cai , Weihua Cai

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Abstract

Helical petal-shaped fuel rods have the characteristics of increased heat transfer area and self-supporting positioning, which makes them have great potential for application in small modular reactors. By employing the multi-scale coupled numerical model, the flow and heat transfer characteristics of the petal-shaped bundle in hexagonal arrangement were obtained under natural circulation conditions. The results indicated that the spatial structure of flow channel exhibited a centrally symmetric distribution. Consistent flow and heat transfer behaviors were obtained at symmetric positions. Additionally, fluid viscosity exerted the most significant influence on flow resistance coefficient. Meanwhile, vortices that develop in the opposite direction resulted in flow losses, which induced variations in the resistance coefficient along the channel. Finally, the applicability of existing flow and heat transfer correlations was evaluated under natural circulation conditions. This study has provided significant theoretical guidance for engineering application of the petal-shaped fuel rods.

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自然循环条件下六边形花瓣状燃料束的流动和传热数值研究

螺旋花瓣形燃料棒具有增加传热面积和自支撑定位的特点，因此在小型模块化反应堆中具有巨大的应用潜力。通过采用多尺度耦合数值模型，获得了六边形布置的花瓣形燃料束在自然循环条件下的流动和传热特性。结果表明，流道的空间结构呈中心对称分布。在对称位置获得了一致的流动和传热行为。此外，流体粘度对流动阻力系数的影响最大。同时，向相反方向发展的涡流会导致流动损失，从而引起通道沿线阻力系数的变化。最后，在自然循环条件下评估了现有流动和传热相关性的适用性。这项研究为花瓣形燃料棒的工程应用提供了重要的理论指导。

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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.