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The formation and dynamics of cavity leading edge cell-like structures on a NACA 16-029 section hydrofoil has been investigated for a range of Reynolds numbers for stable (supercavitation) and shedding cavities (cloud cavitation). Optical measurements of the cavitating structures are made to quantify geometric properties including the size range and shape of the socalled cells, as well as the dynamic behaviour involving growth, division, decline and elimination. Leading edge cell structure was found to be in a state of dynamic equilibrium for the supercavitating case with cell mean cell size a function of the overlying boundary layer thickness. For shedding cavities, the leading edge evolved cyclically from surface related nuclei into streaks, merging to form a contiguous, shedding modulated, cellular structure. In both cases cells grow and with the onset of destabilization division occurs, indicative of the Saffman-Talyor instability.

Item Type:	Refereed Conference Paper
Keywords:	cavitation, hydrofoils, image processing
Research Division:	Engineering
Research Group:	Maritime engineering
Research Field:	Ship and platform structures (incl. maritime hydrodynamics)
Objective Division:	Manufacturing
Objective Group:	Transport equipment
Objective Field:	Nautical equipment
UTAS Author:	Giosio, DR (Dr Dean Giosio)
UTAS Author:	Pearce, BW (Dr Bryce Pearce)
UTAS Author:	Brandner, PA (Professor Paul Brandner)
ID Code:	113937
Year Published:	2016
Deposited By:	NC Maritime Engineering and Hydrodynamics
Deposited On:	2017-01-30
Last Modified:	2018-05-23
Downloads:	114 View Download Statistics