矩形通道双群组界面浓度输运模型与验证方法研究  

Research of Two-Group Interfacial Area Transport Model and Validation Method in Rectangular Channel

作　　者：于洋[1] 宋小明[1] 刘东[1] 郭凤晨[1] 邓志勇 芦韡[1] 黄擎宇 Yu Yang;Song Xiaoming;Liu Dong;Guo Fengchen;Deng Zhiyong;Lu Wei;Huang Qingyu(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213

出　　处：《核动力工程》2021年第S01期113-120,共8页Nuclear Power Engineering

摘　　要：在当前主流核反应堆系统分析软件中,均基于流型选取不同经验关系式计算界面浓度,在流型转换区域会存在数值求解振荡和人工不连续性及适用范围受限等问题。因此,界面浓度输运方程(IATE)被提出用于计算两相流型转变过程中的界面浓度等参数。本文基于玻尔兹曼输运方程建立了双群组IATE,并考虑矩形通道壁面效应的影响,针对气泡破裂与聚合机理分别建立了不同的界面浓度封闭模型。为了评估双群组IATE的适用性,建立了双群组IATE的验证方法,与Sun建立的帽状-湍流实验工况结果符合较好。In the present nuclear reactor system analysis codes,the interfacial area concentration is calculated by the conventional flow regime dependent correlations.To eliminate potential artificial bifurcations or numerical oscillations stemming from the use of conventional static correlations,the interfacial area transport equation(IATE)is proposed to solve the interfacial area concentration in the two-fluid model.In the paper,the two-group IATE is established based on Boltzmann transport equation and the bubble coalescence and disintegration mechanisms are analytically modeled to provide mechanistic constitutive relations.To demonstrate the feasibility of the present approach,the two-group IATE is evaluated in one-dimensional,steady-state form applicable to adiabatic two-phase flow.Based on Data sets under cap-turbulent flow regime obtained from the study of Sun,agreement between the data sets and the model predictions is reasonably good.

关 键 词：界面浓度 矩形通道 界面浓度输运方程(IATE) 

分 类 号：TL334[核科学技术—核技术及应用]