CFD方法研究CFETR WCCB全包层模块不同湍流模型的流场分布与压降  

CFD analysis of flow distributions and pressure drops in the whole CFETR WCCB blanket module with different turbulence models

作　　者：高忠平 赵平辉[1] 李远杰[1] 邓维平[1] 葛志浩[1] 聂星辰[1] 

机构地区：[1]中国科学技术大学核科学技术学院,安徽合肥230027

出　　处：《中国科学技术大学学报》2017年第12期1029-1036,共8页JUSTC

基　　金：磁约束核聚变973专项(2013GB108004);国家自然科学基金(51006095);中央高校基础科研基金(WK2090130019)资助

摘　　要：由于高压水具有优良的热工水力学性能与成熟的工业基础,水冷陶瓷增殖(WCCB)包层成为中国聚变工程实验堆(CFETR)的一种主要的候选包层.为了研究所设计的WCCB包层内的流场分布与压降,采用三维计算流体动力学(CFD)数值模拟方法研究了WCCB包层全模块内的冷却剂流动.结果表明,在冷却板、分隔板和侧板中质量流量分布较均匀,而第一壁中则较不均匀(不均匀度约为30%).由于冷却板中流道较长及流动方向的频繁改变,最大压降出现在冷却板中.考虑到所设计联箱结构上的复杂性,综合考虑湍流模型对模拟结果的影响是必要的.湍流模型的敏感性研究结果表明,湍流模型对包层模块各部件质量流量分配的影响较小;然而,湍流模型对压降的影响是显著的.另外,由于第一壁流场分布得不均匀,有必要对现有包层模块的设计进行优化.As a primary blanket candidate for CFETR（China Fusion Engineering Test Reactor）,the watercooled ceramic breeder（WCCB）blanket is now attracting enormous attention owing to the admirable thermal hydraulic performance and experienced industrial base of pressurized water.To analyze the flow distributions and pressure drops in the designed WCCB blanket,three dimensional numerical simulation of the coolant flow in the whole WCCB module was conducted based on the computational fluid dynamics（CFD）method.The results demonstrate that the flow distribution is uniform in cooling plates（CPs）,stiffening plates（SPs）and side walls（SWs）,but is non-uniform in the first wall（FW）with the unevenness of mass flow rate in FW being about 30%.The maximal pressure drop is in the CPs caused bythe long coolant channel and the frequent change of flow direction.The effect of turbulence models needs to be comprehensively studied due to structural complexity of the designed manifold.Sensitivity analysis of turbulence models shows that different turbulence models have little effect on the mass flux distributions in all parts of the blanket module.However,the deviation of pressure drops is notable as a result of different turbulence models.In addition,the current design of the blanket module needs to be optimized further because of the non-uniform flow distribution in FW.

关 键 词：中国聚变工程实验堆 水冷陶瓷增殖包层 湍流模型 数值分析 

分 类 号：TL334[核科学技术—核技术及应用]