CFETR环面低温泵冷屏挡板的热屏蔽性能研究

Study on the thermal shielding performance of baffle in CFETR torus cryopump

中国科学院等离子体物理研究所(ASIPP)开展了一项研究活动,来评估CFETR环面真空室低温泵中冷屏挡板的热屏蔽性能。采用数值模拟方法,通过设计对照组的方式对不同排布方式下冷屏挡板的热屏蔽性能进行了对比性分析。结果表明:相比于无冷屏挡板结构,布满45度倾斜角的冷屏挡板能够将吸附板表面的辐射热负载降低53.8%;相比于背向阀头的冷屏挡板结构,采用面向阀头的冷屏挡板结构能够将吸附板表面的辐射热负载降低37.5%;当坐标超过0.45 m,冷屏挡板的最大设计间距为30 mm,当坐标超过0.6 m,冷屏挡板的最大设计间距为60 mm,当坐标超过0.94 m,冷屏挡板的最大设计间距为90 mm。

The Institute of Plasma Physics,Chinese Academy of Sciences(ASIPP)has carried out a campaign to evaluate the thermal shielding performance of baffles in CFETR torus cryopump.Numerical simulation method was used to analyze the thermal shielding performance of baffles with different arrangements by designing the control groups.The results show that compared to the structure without baffle,the bafles with inclined angle of 45 degree can reduce the radiant heat load on the cryopanels by 53.8%;Compared to the baffle structure facing away from the valve,the baffle structure facing the valve can reduce the radiant heat load on the cryopanels by 37.5%;When the position coordinate exceeds 0.45 m,the maximum design clearance between baffles is 30 mm.When the position coordinate exceeds 0.6 m,the maximum design clearance between baffles is 60 mm.When the position coordinate exceeds 0.94 m,the maximum design clearance between baffles is 90 mm.