Author(s): Mao Ye; Chao Wu; Yun-Liang Chen; Zong-Na Chen
Linked Author(s):
Keywords: Vortex core radius; Characteristic radius; Curvature
Abstract: The vortex core radius is a main factor of the vortex and it means the radius corresponding to the maximum tangential velocity. The vortex core radius can be obtained by a contactless measurement in the whole flow field; however, the measurement is difficult as the vortex movement is complex. In this paper, the relationship between the vortex core radius and the water-surface curvature characteristic radius was studied, and the characteristic radius is the distance from the position of the maximum water-surface curvature to the vortex symmetry axis. A tenth implicit equation was deduced to express the relationship and a dimensionless relational curve was plotted. Applying the relationship, the vortex core radius was calculated with some experimental data. The determination of the vortex core radius is useful to analyze the vortex characteristics with the research findings such as the velocity, pressure and water-surface curve.
Year: 2007