横摇运动下铅铋回路热工水力特性数值研究  

Numerical Study on Thermal-hydraulic Characteristics of Lead-bismuth Loop System under Rolling Motion

作　　者：袁蓝飞 王成龙[1] 刘志鹏 苏光辉[1] 秋穗正[1] 田文喜[1] YUAN Lanfei;WANG Chenglong;LIU Zhipeng;SU Guanghui;QIU Suizheng;TIAN Wenxi(Department of Nuclear Science and Technology,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学核科学与技术学院,陕西西安710049

出　　处：《原子能科学技术》2023年第6期1151-1158,共8页Atomic Energy Science and Technology

基　　金：国家重点研发计划(2019YFB1901300)。

摘　　要：为研究横摇运动下铅铋回路系统热工水力特性,利用商用CFD软件开发了铅铋回路系统的计算模型以及横摇运动的计算方法,并采用实验数据对数值计算结果进行了验证,其中,横摇运动流量的最大偏差在3%以内。计算结果表明,横摇运动会使回路系统的自然循环流量发生周期性波动,流量波动的周期与运动周期一致,波动的幅度会随着横摇运动最大幅度的增大、运动周期的减小而增大,在最大摇摆角20°摇摆周期7.5 s工况下流量的瞬时波动最大达到了140%,并在一些时刻产生倒流现象。横摇运动也会让系统的流动和传热特性参数发生周期性的瞬时波动,这种波动的规律与自然循环流量的波动规律相似,其中Nu的最大瞬时波动达到了515%,最大时均波动可达66%。本研究获得的结果对横摇运动下的铅铋回路系统设计优化具有重要的工程应用价值和科学意义。Lead-bismuth reactor has the advantages of high inherent safety,strong natural circulation capacity,long operation life and rapid transient response,and has a good application prospect in special applications such as ocean engineering.The Marine device will be affected by wind and waves in the ocean and produce rolling motion,which has a series of effects on the thermal and hydraulic characteristics of the system.In order to study the thermal-hydraulic characteristics of lead-bismuth loop system under rolling motion,the size and structure of the loop system were determined,the CFD geometric model was established,the calculation mesh was drawn and the calculation model of the natural circulation characteristics under rolling motion was developed.Based on the established rolling motion calculation method,the numerical simulation study of rolling motion was carried out under the design conditions,and the influence of rolling motion on the natural circulation capacity and heat transfer characteristics of the loop system was studied.Afterwards,experiments were carried out to compare the experimental data with the simulated data to verify the correctness of the model and the reliability of the conclusions.The relative deviation between simulated and experimental fluid temperature is generally less than 5.3%,and the average relative deviation is less than 4.2%.The relative deviation of wall temperature is generally below 2.1%,and the average relative deviation is 1.67%.In addition,the maximum deviation between simulation and experiment of the rolling motion flow is within 3%.The comparison results demonstrate that there is a little gap between the simulation results and the experimental results,and the gap is within the acceptable range,which indicates that the calculation results are reliable.The simulation results show that the rolling motion will cause periodic fluctuations in the natural circulation flow of the loop system.The period of the flow fluctuation is consistent with the motion period,and the amplitude of t

关 键 词：液态铅铋合金 横摇运动 CFD 热工水力 

分 类 号：TL425[核科学技术—核技术及应用]