圆柱形带反射层反应堆的数值传热计算

Numerical heat transfer in cylindrical nuclear reactor with reflected layer

在结构化和非结构化网格中,采用有限容积方法,数值计算带有反射层(反射层布置分为轴向、径向和复合双向三种情况)的圆柱形反应堆的物理和热特性。首先采用单组法数值求解堆芯和反射层中的热中子注量率密度,并同其精确解相比较,验证彼此的正确性;然后用类似法确定堆内两区中热中子产生的热功率分布规律,并进行数值传热计算。所有结果都与没有反射层的反应堆(裸堆)状况进行比较,并且得到具有参考价值的结果。

The physical properties and the thermal properties of the cylindrical nuclear power reactors with reflected layer（in radical direction,in axial direction and totally reflected） were computed by the finite volume method（FVM） using the unstructured meshes and structured meshes.Firstly,the thermal neutron flux of the core and the reflector were computed by One-group method,the numerical solutions were compared with the exact solutions.The computational results indicated that each other＇s method have a good credibility,then the same method was used to confirm the temperature distributions in the two section,and the numerical solutions of the thermal power was computed.All results for the reflected reactor were compared with those for bare reactor and these can provide a useful reference for the nuclear engineering design and research.