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Inviscid cavity flow over a wall-mounted fence

Citation

Pearce, BW and Brandner, PA, Inviscid cavity flow over a wall-mounted fence, Ocean Engineering: An International Journal of Research and Development, 80 pp. 13-24. ISSN 0029-8018 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Elsevier

DOI: doi:10.1016/j.oceaneng.2014.02.003

Abstract

Two-dimensional cavitating flow over a sharped-edged wall-mounted fence is investigated using inviscid analysis. Similar devices are used for lift generation or enhancement on the trailing edges of aero- and hydrofoils (Gurney flaps, spoilers) or ship transoms (interceptors). The sharp edge induces stable flow/cavity detachment, with lift resulting from the surface pressure distribution acting on the wall upstream of the fence. Analytical and numerical results are presented and compared from which the ‘ideal’ maximum hydrodynamic performance of such devices is obtained. The upstream wall pressure distribution reduces rapidly initially, then eventually as a power law relation in the far field. As the relative cavity pressure is reduced and hence also the cavity length from the infinite upper bound, there is a corresponding reduction in magnitude of the pressure distribution. An ‘ideal’ maximum hydrodynamic efficiency (Lift/Drag)) of greater than 40 is obtained with both cavity and upstream wall of infinite length. For a finite wall length of practical size this value reduces to about 15. Within the limits of 2-D inviscid analysis these results give the upper bound to the hydrodynamic performance possible and general character of cavitating flow over a sharped-edged wall-mounted fence.

Item Details

Item Type:Refereed Article
Keywords:Wall-mountedfence Interceptor flow Cavitation, Boundary element method, Hodograph method, Freestreamline flow
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:Pearce, BW (Dr Bryce Pearce)
Author:Brandner, PA (Professor Paul Brandner)
ID Code:89448
Year Published:2014
Web of Science® Times Cited:5
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2014-03-05
Last Modified:2017-11-03
Downloads:1 View Download Statistics

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