Abstract
Flow visualization was used to investigate experimentally the evolution process from symmetrical shedding to staggered shedding of the starting vortex and the phenomenon of secondary separation on an elliptic cylinder at moderate Reynolds numbers. The vortex structure of the flow separation was studied. The temporal variation of separation angle and length of wake vortex were given.
The photographs and experimental results provided basis for further investigation of the complicated feature of the starting process of unsteady separated flows around an elliptic cylinder.
Similar content being viewed by others
References
Taneda, S., The development of the lift of an impulsively started elliptic cylinder at incidence,J. Phys. Soc. Japan 33(1972), 1706–1711.
Honji, H., Starting flows past spheres and elliptic cylinders.Rep. Res. Inst., Appl. Mech.,14(1972), 271–281.
Taneda, S., Visual study of unsteady separated flows around bodies,Progr. Aerospace Sci.,17(1977), 287–348.
Izumi, K., Kuwahara, K., Horiuti, K. & Oshima, K., International Symposium on flow visualization, Bochum 9–12, Sept. 1980, 394–398.
Lugt, H. & Haussling, H.J., Laminar flow past an abruptly accelerated elliptic cylinder at 45 ° incidence,J. Fluid Mech.,65 (1974), 711–734.
Chen Yunming,Acta Mech. Sinica,6(1983), 571–578.
Author information
Authors and Affiliations
Additional information
The project supported by the National Natural Science Foundation of China.
Rights and permissions
About this article
Cite this article
Dieli, Z. The evolution of starting vortex and secondary separation on an elliptic cylinder. Acta Mech Sinica 5, 20–30 (1989). https://doi.org/10.1007/BF02486682
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02486682