The secondary velocity vector plots show that the migration of the secondary vortex across the main flow was influenced by flow rates which made the centrifugal and Coriolis force changing.

• 二次流矢量图表明流量的改变影响了离心力和哥氏力在流动中的作用，导致在垂直于主流方向引起截然不同的二次涡旋流动。