As an important component of tokamaks,the divertor is mainly responsible for extracting heat and helium ash,and the targets of the divertor need to withstand high heat flux of 10 MW m-2 for steady-state operation.In t...As an important component of tokamaks,the divertor is mainly responsible for extracting heat and helium ash,and the targets of the divertor need to withstand high heat flux of 10 MW m-2 for steady-state operation.In this study,we proposed a new strategy,using microchannel cooling technology to remove high heat load on the targets of the divertor.The results demonstrated that the microchannel-based W/Cu flat-type mock-up successfully withstood the thermal fatigue test of 1000 cycles at 10 MW m^(-2)with cooling water of 26 l min^(-1),30°C(inlet),0.8 MPa(inlet),15 s power on and 15 s dwell time;the maximum temperature on the heat-loaded surface(W surface)of the mock-up was 493°C,which is much lower than the recrystallization temperature of W(1200°C).Moreover,no occurrence of macrocrack and‘hot spot’at the W surface,as well as no detachment of W/Cu tiles were observed during the thermal fatigue testing.These results indicate that microchannel cooling technology is an efflcient method for removing the heat load of the divertor at a low flow rate.The present study offers a promising solution to replace the monoblock design for the EAST divertor.展开更多
为研究新型闭口型压型钢板Econdek65-675组合板的破坏、挠曲、端部滑移特性及纵向承载能力,根据欧洲规范对4对18块组合板进行试验而获得相关系数m,k。制作的18个试件分别为115 mm、150 mm、200 mm 3种厚度3组,每组由3块短板与3块长板组...为研究新型闭口型压型钢板Econdek65-675组合板的破坏、挠曲、端部滑移特性及纵向承载能力,根据欧洲规范对4对18块组合板进行试验而获得相关系数m,k。制作的18个试件分别为115 mm、150 mm、200 mm 3种厚度3组,每组由3块短板与3块长板组成。试验结果发现3组试件都发生明显的端部滑移,呈现过早的纵向剪切破坏。将试验结果与欧洲规范和美国规范进行对比,结果表明欧洲规范更为准确。同时,给出了该种组合板纵向承载力计算公式及相关曲线,并与类似的其他组合板进行对比,结果显示Econdek65-675组合板具有较可靠的组合效率。展开更多
基金financial support from the National MCF Energy R&D Program(No.2018YFE0312300)National Natural Science Foundation of China(No.51706100)+1 种基金the Natural Science Foundation of Jiangsu Province(No.BK20180477)Fundamental Research Funds for the Central Universities(No.30918011205)。
文摘As an important component of tokamaks,the divertor is mainly responsible for extracting heat and helium ash,and the targets of the divertor need to withstand high heat flux of 10 MW m-2 for steady-state operation.In this study,we proposed a new strategy,using microchannel cooling technology to remove high heat load on the targets of the divertor.The results demonstrated that the microchannel-based W/Cu flat-type mock-up successfully withstood the thermal fatigue test of 1000 cycles at 10 MW m^(-2)with cooling water of 26 l min^(-1),30°C(inlet),0.8 MPa(inlet),15 s power on and 15 s dwell time;the maximum temperature on the heat-loaded surface(W surface)of the mock-up was 493°C,which is much lower than the recrystallization temperature of W(1200°C).Moreover,no occurrence of macrocrack and‘hot spot’at the W surface,as well as no detachment of W/Cu tiles were observed during the thermal fatigue testing.These results indicate that microchannel cooling technology is an efflcient method for removing the heat load of the divertor at a low flow rate.The present study offers a promising solution to replace the monoblock design for the EAST divertor.
文摘为研究新型闭口型压型钢板Econdek65-675组合板的破坏、挠曲、端部滑移特性及纵向承载能力,根据欧洲规范对4对18块组合板进行试验而获得相关系数m,k。制作的18个试件分别为115 mm、150 mm、200 mm 3种厚度3组,每组由3块短板与3块长板组成。试验结果发现3组试件都发生明显的端部滑移,呈现过早的纵向剪切破坏。将试验结果与欧洲规范和美国规范进行对比,结果表明欧洲规范更为准确。同时,给出了该种组合板纵向承载力计算公式及相关曲线,并与类似的其他组合板进行对比,结果显示Econdek65-675组合板具有较可靠的组合效率。
