摘要
通过数值模拟来研究和分析某环形叶栅轮毂壁面旋转对静子叶根角区流动结构的影响.研究结果表明:轮毂正向转动可以减小叶栅端壁区的流动堵塞,轮毂端壁角区的流动结构由三维分离流动结构转变为泄漏涡占主导的端壁分离结构.轮毂壁面旋转带来的叶栅角区流动结构的变化根本原因在于端壁转动引起的叶栅根部间隙泄漏增强,阻碍了轮毂端壁附面层二次流向叶片吸力面角区的堆积.
The effect of rotating speed on corner flow separation and its mechanism has been investigated by numerical simulation on an experimental annular cascades.The results show that the positive rotation of hub wall would reduce blockage in cascades.The mass flow rate of cascades is improved when the rotation speed increase.The 3-D hub corner separation can be removed by the rotation speed increasing.The detail analysis results show that the increasing of the leakage mass flow rate is the key reason for the corner separation removed.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2012年第12期2792-2798,共7页
Journal of Aerospace Power
关键词
压气机静子
轮毂旋转
角区分离
泄漏流
端壁二次流
compressor stator
hub rotation
corner separation
leakage flow
secondary flow
