摘要
为研究铅铋螺旋管式直流蒸汽发生器(H-OTSG)壳侧的流动传热特性,提出了一种用于螺旋管束内铅铋流动传热特性的数值模拟方法。基于现有的相关实验数据,对不同湍流模型进行了验证,在验证数值模型可靠性的基础上,对铅铋H-OTSG壳侧进行数值模拟,以分析流速和螺旋升角对其传热和阻力特性的影响。结果表明,H-OTSG壳侧流动阻力和换热均随流速和螺旋升角的增大而增强。流速增大会显著增强流场均匀性,螺旋升角增大会影响涡旋分布并加强交混。本研究为铅铋螺旋管流动传热特性研究和设计优化提供参考。
In order to study the flow and heat transfer characteristics in the shell side of LBE Helical-coiled Once-Through Steam Generator(H-OTSG),a numerical method for the simulation of the LBE flow and heat transfer characteristics in helical tube bundles is proposed.Based on available relevant experimental studies,different turbulence models are validated.After validating the reliability of the numerical model,the shell side of LBE H-OTSG is simulated and the influence of velocity and helix angle on heat transfer and flow resistance characteristics are analyzed.The results show that the shell side flow resistance and heat transfer increase with the increase of flow rate and helix angle.An increase in velocity would make the flow fields more uniform.The increase of helix angle affects the vortex distribution and enhances the mixing.This study provides a reference for the study of flow and heat transfer characteristics and design optimization of LBE helical tube.
作者
沈聪
刘茂龙
刘利民
徐子伊
顾汉洋
Shen Cong;Liu Maolong;Liu Limin;Xu Ziyi;Gu Hanyang(School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai,200240 China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2022年第S02期13-18,共6页
Nuclear Power Engineering
关键词
铅铋螺旋管
壳侧
流动传热
数值模拟
LBE helical tube
Shell side
Flow and heat transfer
Numerical simulation