摘要
为研究堵流工况下氦氙混合比例对堆内通道流动换热特性的影响,本文对单通道在不同阻塞率、不同氦氙混合比例下进行了数值模拟。本文使用商用数值计算软件,建立不同阻塞模型,计算不同氦氙混合比例下通道流动换热特性。结果表明:换热特性方面,通道堵塞会在堵塞区域形成明显涡结构及边界层分离现象,导致壁面局部高温,而阻塞率对通道对流换热系数几乎没有影响;流动特性方面,随着阻塞率增大,压降及摩擦阻力系数呈增大趋势,而随氦氙混合比的增大呈同样变化趋势;综合性能系数随氦氙混合比例呈下降趋势,而随着阻塞率增大综合性能系数值越小,阻塞率越大对通道流动换热特性影响越明显。
To examine the effect of the helium-xenon mixture ratio on the flow and heat transfer characteristics of the reactor channel under the blockage condition,a numerical simulation is performed for a single channel under different blockage rates and helium-xenon mixture ratios.In this study,commercial software for numerical calculations was used to establish different blockage models and calculate the flow and heat transfer characteristics of channels with different helium-xenon mixing ratios.The results show that,in terms of heat transfer characteristics,a channel blockage will form an obvious vortex structure and boundary layer separation in the blocked area,leading to a high local temperature on the wall,whereas the blockage rate has little effect on the convective heat transfer coefficient of the channel.In terms of flow characteristics,the pressure drop and friction coefficient increase with the increase in the blockage ratio,and the trend is the same with the increase in the helium-xenon mixture ratio.The comprehensive performance coefficient decreases with the mixing ratio of helium and xenon.Moreover,the larger the blockage ratio,the smaller the comprehensive performance coefficient;the greater the blockage ratio,the more obvious the influence on the flow and heat transfer characteristics of the channel.
作者
董显敏
宁可为
赵富龙
卢瑞博
谭思超
田瑞峰
DONG Xianmin;NING Kewei;ZHAO Fulong;LU Ruibo;TAN Sichao;TIAN Ruifeng(College of Nuclear Science and Technology,Harbin Engineering University,Harbin 150001,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2022年第12期1706-1711,共6页
Journal of Harbin Engineering University
基金
黑龙江省博士后基金项目(LBH-MZ9013).
关键词
堵流工况
氦氙混合比例
阻塞率
流动特性
换热特性
综合性能系数
对流换热系数
摩擦阻力系数
flow blockage conditions
proportion of helium-xenon mixture
blocking ratio
flow characteristics
heat transfer characteristics
comprehensive performance coefficient
convective heat transfer coefficient
friction resistance coefficient
