HCCB TBM屏蔽块热工水力分析

摘要

Preliminary design for HCSB TBM shield was introduced, and much attention is paid to the comparison between conception design review (CDR) design and the current design, the thermal-hydraulic analyses of TBM shield was performed. The results of analyses indicate that the maximum temperature of TBM shield is about 246.9℃at the bottom key. The velocity, pressure and wall heat transfer coefficient are all well below the allowable values. Moreover, a panel is added to reduce the temperature of bottom key based on the result of thermal-hydraulic analysis.%介绍了HCCB TBM屏蔽块初步设计阶段的最新设计,对比了概念设计评审阶段设计方案在结构上的差别,并对其进行了热工水力的分析.结果表明:温度最高处位于下防剪切键顶端,为246.9℃.速度、压强和对流换热系数均满足ITER标准.另外,根据温度分析计算结果,在下防剪切键处增加了挡板,其对于防剪切键的温度降低有显著效果.