西华大学学报（自然科学版）2026，Vol.45Issue(5)：58-67,10.DOI:10.12198/j.issn.1673-159X.5803
铅铋反应堆主泵入口结构对主泵性能的影响
Influence of Lead-Bismuth Reactor Main Pump Inlet Structure on Main Pump Performance
摘要
Abstract
A hydraulic model of the main pump inlet structure was built to study the influence of the main pump inlet structure of lead-cooled fast reactors(LFRs)on the internal flow and hydraulic perform-ance of the nuclear main pump.Based on numerical calculations and theoretical analysis,the SST k-ω tur-bulence model was adopted,and ANSYS CFX was employed to conduct transient numerical simulations of the lead-bismuth main pump with an inlet structure,and flow field and performance comparisons were made with the main pump without an inlet structure.The influence of the inlet structure on the internal flow patterns and hydraulic performance of the main pump was investigated.The results show that after adding the inlet structure to the main pump,the shaft power increases,the head increases by 4.5%,and the im-peller head in the mainstream area rises.This structure causes non-uniform flow field distribution at the pump inlet,and multiple pairs of vortices and secondary flows are generated at the impeller inlet,thus chan-ging the liquid flow angle at the impeller inlet.The non-uniform flow field ultimately reduces the hydraulic efficiency of the main pump.Therefore,the key point for the engineering application of the nuclear main pump should be the coupling design of the main pump and the inlet structure to both weaken the influence of the inlet structure on the impeller inlet flow field and ensure the hydraulic performance.关键词
铅冷快堆/核主泵/入口结构/非均匀入流/数值模拟/试验验证Key words
lead-cooled fast reactors/nuclear main pump/inlet structure/non-uniform inflow/numerical simulation/experimental validation分类
能源科技引用本文复制引用
杨从新,段鑫森,王岩,谭鑫,郭艳磊,吕天智..铅铋反应堆主泵入口结构对主泵性能的影响[J].西华大学学报（自然科学版）,2026,45(5):58-67,10.基金项目
国家自然科学基金项目(12062012). （12062012）
