Influence of helix angle on flow and heat transfer characteristics of lead-bismuth flow in helical-coiled tube bundles

被引：13

作者：

Shen, Cong ^{[1
]}

Liu, Limin ^{[1
]}

Xu, Ziyi ^{[1
]}

Gu, Hanyang ^{[1
]}

Liu, Maolong ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai 200240, Peoples R China

来源：

ANNALS OF NUCLEAR ENERGY | 2023年 / 180卷

关键词：

Helical -coiled steam generator; Helical -coiled tube bundles; Liquid metal; Helix angle; UNSTEADY NUMERICAL SIMULATIONS; TURBULENT PRANDTL; PRESSURE-DROP; CROSS-FLOW; PREDICTION;

D O I：

10.1016/j.anucene.2022.109483

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The SST k-omega model and turbulent Prandtl number model are used in this paper to simulate liquid lead-bismuth cross-flow and heat transfer in helical-coiled tube bundles with different helix angles. The numerical method is validated using relevant experimental data from previous research. The helix angle significantly influences the flow and heat transfer due to the flow pattern transition and continuously changing tube arrangements. The friction factor and Nusselt number both increase firstly and then decrease with the increase of the helix angle. The flow fields are analyzed from the perspective of velocity magnitudes, streamlines, vortex structures and turbulence intensities. The complicated flow structure induced by the helix angle significantly impacts the flow and heat transfer performance. The field synergy principle is applied to analyze the enhancement of heat transfer. The achievement in this paper can be a reference for numerical methods and design optimization of liquid metal H-OTSG.

引用

页数：13

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