摘要
Abstract
In order to improve the heat dissipation reliability of the nuclear power control system chip.Three types of water-cooled radiator structures are designed,including straight tooth,S-shaped,and circular pin-fin structures.The model is divided into hexahedral grids,and CFD software is used to set the outer wall surface to be insulated.Pure water is used as the fluid medium,and the inlet temperature is 20℃.The mainstream Reynolds coefficients are 10 000,20 000,30 000,40 000,and 50 000.The lower surface is the heat source,and the heat consumption is Q=100 W.The SIMPLE algorithm is used for simulation,The results show that the average temperature of the bottom surface of the three heat sinks tends to be flat with the increase of the flow velocity,and the heat dissipation coefficient Nu is also the same.S-type radiator has higher heat transfer coefficient and lower average bottom temperature.The pressure loss of S-type radiator is much higher than that of the other two schemes with the increase of flow rate,and the system resistance is large.By calculating the comprehensive coefficient of the heat dissipation process of the three heat sinks,and considering the heat dissipation capacity and other factors,it is considered that the circular fin heat sink can be the optimal solution.关键词
核电/控制系统芯片/散热器/CFD软件/SIMPLE算法/换热系数Key words
nuclear power/control system chip/radiator/CFD software/SIMPLE algorithm/heat transfer coefficient分类
电子信息工程
