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

Barbaca, L ORCID: 0000-0002-8421-1109, Pearce, BW ORCID: 0000-0003-2189-5598 and Brandner, PA ORCID: 0000-0002-6721-878X 2017 , 'Experimental study of ventilated cavity flow over a 3-D wall-mounted fence' , International Journal of Multiphase Flow, vol. 97 , pp. 10-22 , doi: 10.1016/j.ijmultiphaseflow.2017.07.015.

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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 Type: Article
Authors/Creators:Barbaca, L and Pearce, BW and Brandner, PA
Keywords: ventilated cavity, wall-mounted fence, experiment, cavitation tunnel
Journal or Publication Title: International Journal of Multiphase Flow
Publisher: Pergamon Press
ISSN: 0301-9322
DOI / ID Number: 10.1016/j.ijmultiphaseflow.2017.07.015
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©2017 Elsevier Ltd. All rights reserved.

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