水冷反应堆类四边形子通道超临界热传递熵产规律研究  

Influence Mechanism of System Parameters on EntropyGeneration in Sub-channel of Rod Bundle

作　　者：王为术[1] 郭玲伟 刘军 WANG Weishu;GUO Lingwei;LIU Jun(Institute of Thermal Energy Engineering,North China University of Water Resources and Electric Power,Zhengzhou of Henan Prov.450011,China)

机构地区：[1]华北水利水电大学热能工程研究中心,河南郑州45004

出　　处：《核科学与工程》2020年第2期196-203,共8页Nuclear Science and Engineering

基　　金：国家自然科学基金项目(51406026);河南省高校科技创新团队支持计划资助项目(16IRTSYHN017);河南省科技创新人才计划(154100510011)。

摘　　要：为揭示超临界水冷反应堆类四边形子通道内传热机制,在压力为23~28 MPa,热流密度为600~800 kW/m^2参数范围研究棒径为8 mm,栅距比为1.1~1.4的类四边形子通道内热传递熵产规律。采用数值模拟软件,计算子通道内超临界水熵产及传热系数,通过改变系统热工参数,分析压力、热流密度和栅距比对子通道内超临界水热传递的熵产规律。研究结果表明:在整个焓值区域内,栅距比、热流密度与压力参数的升高均会引起子通道内熵产增加,传热系数下降,压力与热流密度参数变化导致不同焓值区域内熵产及传热系数的差异分布,而栅距比参数增加引起的传热特性变化则在整个焓值区域内表现一致。In order to reveal the heat transfer mechanism of square sub-channel in supercritical water-cooled reactors,the law of heat transfer entropy production in a square sub-channel with a rod diameter of 8 mm and a pitch ratio of 1.1~1.4 was studied in the parameter range of pressure ranging from 23 MPa to 28 MPa and heat flux ranging from 600 kW/m^2 to 800 kW/m 2.The numerical simulation method was used to study the heat transfer characteristics and entropy production behavior of supercritical water in the sub-channel.By changing the thermal parameters of the system,the thermal parameters such as pressure,heat flux and pitch ratio are analyzed for the supercritical water heat transfer entropy production in the sub-channel.The results show that in the whole enthalpy area,the increasing of heat flux,pitch ratio and pressure parameters will cause the heat transfer coefficient to decrease,and the entropy production to rise to varying degrees.The change of pressure and heat flux parameters leads to the difference distribution of entropy production and heat transfer coefficient in different enthalpy value regions,while the change caused by the increase of pitch ratio parameter is consistent in the whole enthalpy value region.

关 键 词：超临界水 类四边形子通道 传热特性 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]