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Experimental study of ventilated cavity flow over a 3-D wall-mounted fence

Citation

Barbaca, L and Pearce, BW and Brandner, PA, Experimental study of ventilated cavity flow over a 3-D wall-mounted fence, International Journal of Multiphase Flow, 97 pp. 10-22. ISSN 0301-9322 (2017) [Refereed Article]


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DOI: doi:10.1016/j.ijmultiphaseflow.2017.07.015

Abstract

Ventilated cavity flow over a fixed height 3-D wall-mounted fence is experimentally investigated in a cavitation tunnel for a range of free-stream conditions. The impact of 3-D effects on cavity topology is examined, along with the dependence of the cavitation number and drag on the volumetric flow rate coefficient, fence height based Froude number and vapour pressure based cavitation number. Three different flow regimes are identified throughout the range of cavitation numbers for a particular free-stream condition. Generally, the cavity has a typical re-entrant jet closure the intensity of which is found to increase linearly with increasing Froude number. This increase in re-entrant jet intensity causes an increase in drag with Froude number for constant volumetric flow rate coefficient. At low Froude numbers the closure mechanism transitions from a single to a split re-entrant jet. The parameters used to characterize the cavity topology show a linear dependence on Froude number irrespective of the closure mode. The cavity topology and drag are found to be independent of vapour pressure based cavitation number.

Item Details

Item Type:Refereed Article
Keywords:ventilated cavity, wall-mounted fence, experiment, cavitation tunnel
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Ship and Platform Hydrodynamics
Objective Division:Manufacturing
Objective Group:Transport Equipment
Objective Field:Nautical Equipment (excl. Yachts)
Author:Barbaca, L (Mr Luka Barbaca)
Author:Pearce, BW (Dr Bryce Pearce)
Author:Brandner, PA (Associate Professor Paul Brandner)
ID Code:119618
Year Published:2017
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2017-08-03
Last Modified:2017-08-09
Downloads:0

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