Laser-induced cavitation bubble collapsing in the vicinity of the leading edge of a hydrofoil

In the present study, a high energy pulsed laser is used to generate a millimetric cavitation bubble within a water flow over a symmetric hydrofoil. The bubble is initiated at different locations in the vicinity of the hydrofoil leading edge. A high-speed camera is used to observe the motion and the deformation of the bubble as it travels along the hydrofoil suction side. We have found that the pressure gradient plays a major role on the bubble dynamic and subsequent phenomena. For a specific region of the flow, the micro-jet initiated at the collapse of the bubble is no more directed towards the hydrofoil surface, as commonly observed in still water. In this case, we also observe a spectacular behaviour of the cavity rebound, which migrates towards the solid surface despite of the outward direction of the micro-jet.


Published in:
Proceedings of the 1st EPFL Doctoral Conference in Mechanics, 121-124
Presented at:
1st EPFL Doctoral Conference in Mechanics, Lausanne, Switzerland, February 19, 2010
Year:
2010
Publisher:
Lausanne, Switzerland, EPFL Doctoral Conference in Mechanics - EDCM2010
ISBN:
978-2-8399-0646-3
Keywords:
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2011-10-21, last modified 2018-03-17

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