TOPAZ-Ⅱ型反应堆堆芯热工水力数值模拟

Numerical Simulation of Thermal-hydraulic Behavior in TOPAZ-Ⅱ Reactor Core

利用成熟的软件建立了TOPAZ-Ⅱ型反应堆三维流动及换热的计算模型,以结构化为主非结构化为辅相结合的方式进行了网格划分,以符合实际的边界条件等作为输入参数,对堆芯热工水力行为进行了数值模拟,经过数值求解得到了三维流场和温度场结果,并得到了冷却剂流量分配、压力分布、速度分布以及堆内慢化剂、端部及侧反射层等部件的温度分布。经比较,数值模拟结果与俄方设计结果符合较好,本研究为此类型研究堆热工水力设计优化积累了经验。

Three-dimensional flow and heat transfer model was established for TOPAZ-Ⅱtype of reactor by mature tools.The mesh was mainly generated with structured grid method supplemented by unstructured mesh.The real conditions were adopted as the input parameters.The thermal-hydraulic behavior simulation was performed with mature computational fluid dynamics software.Through numerical simulation,the three-dimensional flow field and temperature field were obtained,as well as key parameters,such as coolant mass flow rate distribution,pressure distribution,velocity distribution,and temperature distributions of moderator and reflector,etc.Through comparison,the results show good agreement with those of Russian design.And rich experience was accumulated through this effort for further thermal-hydraulic optimization of this type of reactor.