Study on thermal-hydraulic performance of airfoil fin PCHE using vortex generators with different arrangement parameters for SCO2 Brayton cycle

IF 3.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY Progress in Nuclear Energy Pub Date : 2025-03-17 DOI:10.1016/j.pnucene.2025.105724

Yangguang Zhang , Zhen Li , Daogang Lu , Qiong Cao , Henghua Liang

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Abstract

The performance of the airfoil fin printed circuit heat exchanger (PCHE) is of great importance for the efficiency and size scale of Generation IV nuclear energy systems coupled to supercritical carbon dioxide (SCO₂) Brayton cycles. Arranging vortex generator (VG) inside the airfoil fin channel could effectively enhance the comprehensive performance of PCHE, however, related studies are still limited. In particular, the study of the thermal-hydraulic characteristics of SCO₂ in the PCHE channel with different arrangement parameters of the VG, which is important for the optimization of the PCHE performance, is very lacking. Therefore, it is of great significance to study the influence of parameters such as vertical spacing (L_a,VG) and horizontal spacing (L_b,VG) between the VG and the fin, the angle of attack (θ) and offset direction of the VG on the flow and heat transfer performance of the SCO₂ in the PCHE flow channel. This study compares the flow and heat transfer performance of the channel with different arrangement parameters of VG, and reveals the flow and heat transfer mechanism of SCO₂ in the channel. The results show that with the increase of L_a,VG, the thermal performance of the PCHE channel is weakened and then strengthened, and the flow performance is gradually weakened. With the increase of L_b,VG, the thermal performance of the PCHE channel is enhanced and then weakened, the flow performance is weakened, then enhanced and finally weakened. With the increase of θ, the thermal performance of the PCHE channel is gradually enhanced, while the flow performance is gradually weakened. The thermal performance of the PCHE channel is best when the VG deviation direction is different on both sides of the fin. Field synergy principle, entropy production principle, distribution of turbulent kinetic energy, distribution of vortex structure, and properties of SCO₂ can well explain these. In addition, among the different VG arrangement parameters, L_a,VG of 0.7 mm, L_b,VG of 3 mm, θ of 45°, and the different direction of VG deviation on both sides of the airfoil fins are recommended.

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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.