摘要
屏蔽块是国际热核聚变实验堆(ITER)的重要组成部分之一,其结构设计尤其是内部冷却剂通道设计将直接影响屏蔽块的冷却效果及模型的安全性。运用计算流体力学(CFD)软件对屏蔽块模型进行热工水力计算,根据计算结果提出改进建议,并对改进后的模型重新进行数值分析。结果表明:屏蔽块的进出口段压降减小,冷却剂流动总压降减小;主要冷却支管的流量分配和流速分布更加均匀;屏蔽块表面局部最高温度大大降低,可避免由于冷却不均造成模块热应力过大。
As an important part for ITER, shield block is used to shield the neutron heat. The structure design of shield block, especially the inner coolant channel design will influence its cooling effect and safety significantly. In this study, the thermal-hydraulic analysis for shield block has been performed by the computational fluid dynamics software, some optimization suggestions have been proposed and thermal-hydraulic characteristics of the improved model has been analyzed again. The analysis results for improved model show that pressure drop through flow path near the inlet and outlet region of the shield block has been reduced, and the total pressure drop in cooling path has been reduced too; the uniformity of the mass flowrate distribution and the velocity distribution have been improved in main cooling branches; the local highest temperature of solid domain reduced considerably, which could avoid thermal stress becoming too large because of coolant effect unevenly.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2013年第2期40-43,共4页
Nuclear Power Engineering
关键词
ITER
屏蔽块
热工水力
设计改进
ITER, Shield block, Thermal-hydraulic, Design improvement
