矩形通道临界热流密度计算模型的实验评价  

Experimental Evaluation of Critical Heat Flux Calculation Models of Rectangular Channel

作　　者：盛程[1] 周涛[1] 琚忠云[1] 黄彦平 肖泽军 

机构地区：[1]华北电力大学核热工安全与标准化研究所,北京102206 [2]中核集团核反应堆热工水力技术重点实验室,成都610041

出　　处：《核动力工程》2014年第1期52-55,共4页Nuclear Power Engineering

基　　金：国家自然科学基金资助(50976033);华北电力大学"211工程"三期校内面上项目(X10011);中国核动力研究设计院空泡物理与自然循环国家重点实验室基金(9140C7101030902)

摘　　要：自然循环条件下,矩形通道内的临界热流密度(CHF)发生受到很多因素影响,目前对其特征的把握尚不完善。将本研究中得到的实验结果与Katto的强迫循环和Zhang的自然循环两种CHF模型的计算值进行比较,分析两种模型在实验条件下的适用性以及入口流速、出口质量含汽率和压力对CHF的影响。研究表明:Katto模型的计算结果普遍高于实验值,而Zhang模型的计算结果与实验值符合较好。随着入口流速的增大,自然循环和强迫循环CHF均逐渐增大;随着出口质量含汽率的增大,两类循环的CHF均减小;随着压力的增大,两类循环的CHF都增大,而在较大压力条件下自然循环CHF的增长速率随系统压力的增大而减小。Under the natural circulation conditions, the CHF occurring in rectangular channels is influ- enced by lots of factors, which have not understood completely yet. The experimental results obtained from current research were compared with the calculation results of Katto forced circulation model and Zhang natural circulation model. The applicability of the two models and effects of inletveiocity, outlet quality and pressure on the CHF under the experimental conditions were analyzed. Research indicated that the calculation results of Zhang model coincided better with the experimental values than that of Katto model. As the inlet velocity increased, the CHF of both natural and forced circulations would increase. As the outlet quality in- creased, the CHF of both circulations would decrease. As the system pressure increased, the CHF of both cir- culations would increase, and the increment speed of CHF would decrease under the higher pressure condition in natural circulation.

关 键 词：自然循环 矩形通道 临界热流密度 

分 类 号：TK124[动力工程及工程热物理—工程热物理]