各种排列双圆柱绕流相干性研究

STUDY OF FLOW INTERFERENCE BETWEENTWO CIRCULAR CYLINDERS IN VARIOUSARRANGEMENTS

本文讨论了各种排列双柱绕流的相干性问题。低湍流度高Re数的实验表明升力是由尾涡诱导引起的,而双稳态现象是由尾涡不稳定性引起的。此外,还对高湍流度状态作了探索性的工作,发现由于尾涡的可分性和狭缝流方向的不稳定性所共同引起的双稳态现象与低湍流度的情况有很大不同,升力和阻力也是如此。

This paper discusses the interference of flow between two circular cylinders in various arrangements. The experiment at higher Reynold number and low turbulent shows that lift is caused by the induce of wake vortex and bistable phenomenon by the unsepar-ability of the wake vortex. Certain amount of explorative work at bigher terbulent has been done, and find that the bistable phenomenon caused by both the separability of wake vortex and the unstability of the direction of gap flow are much different from that at low turbulent, so are the lift and drag.