该预旋角情况下，进气雷诺数对盘面平均努赛尔特数的影响大于旋转雷诺数。
The cooling flow rate have more effects on average nu number than rotating speed in this pre-swirl Angle.
分析结果表明，叶冠的紧度由预扭角和工作载荷决定，离心力对紧度的变化起主要作用。
Analysis results indicate: shroud tightness is determined by pre-twist Angle of shroud and working load, the centrifugal force plays a main role to the tightness change.
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