ITER边校正场线圈测试冷屏结构设计与数值模拟

Thermal shield structure design and numerical simulation of ITER edge calibration field coil test

针对国际热核聚变实验堆(ITER)边校正场线圈测试过程的重要装置-冷屏进行结构设计、理论计算与数值模拟。选择的冷屏面板材料为6061铝合金;确定的冷却管截面为外方内圆的结构型式,其布置间距为450 mm;采用的为G10复合材料加工而成的多层叠片式柔性结构支撑件。为验证设计合理性,对冷屏各部件进行仿真分析,并通过理论计算得出冷屏表面热负荷大小,最后利用有限元方法对冷屏整体结构传热性能进行数值模拟。结果表明:冷屏部件结构强度满足材料屈服极限;热负荷理论计算结果符合技术要求;冷屏表面温度分布均匀。此设计为后续边校正场线圈测试过程提供了理论参考和技术支撑。

This paper mainly focuses on the structural design,theoretical calculation and numerical simulation of the thermal shield,an important device in the test process of the side correction field coil of the International Thermonuclear Experimental Reactor(ITER).The selected thermal shield panel material is 6061 aluminum alloy;the determined cooling pipe cross-section is a configuration of outer square and an inner circle,and its arrangement spacing is 450 mm;the adopted multi-layer flexible structural support is made of G10 composite material.In order to verify the rationality of the design,this paper conducts a simulation analysis of each component of the thermal shield,and obtains the surface heat load of the thermal shield through theoretical calculation.Finally,the finite element method is used to numerically simulate the heat transfer performance of the overall structure of the thermal shield.The results show that the structural strength of the thermal shield meets the material yield limit;the theoretical calculation results of the thermal load meet the technical requirements;the temperature distribution on the thermal shield surface is uniform.This design provides a theoretical reference and technical support for the subsequent tes-ting process of the side correction field coil.