Chinese Journal of Theoretical and Applied Mechani ›› 2006, Vol. 38 ›› Issue (4): 547-552.DOI: 10.6052/0459-1879-2006-4-2005-020

• Research paper • Previous Articles     Next Articles

Experimental observations of inception cavitation vortices around a hydrofoils

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  1. 北京理工大学机械与车辆工程学院,100081
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-07-25 Published:2006-07-25

Abstract: The inception cavitation around a 2D-hydrofoil in the boundary layer of a non-separated turbulent flow was studied experimentally. The cavitation inceptions were observed by a high speed video camera, and the velocities around the hydrofoil were measured by a 2D-LDV. It is shown that the inception cavitation bubbles are generated along with a hairpin-shaped vortex coherent structure in the boundary layer of the non-separated turbulent flow. The developing process of an inception cavitation bubble vortice comprises generation, expanding, collapse, rebound and re-collapse. It is concluded that the inception cavitation has dual characteristics of both bubbles and coherent structures.

Key words: hydrofoil,inception cavitation,coherent structures,2D-LDV,cavitation bubble vortices