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Numerical analysis of base-ventilated intercepted supercavitating hydrofoil sections

Citation

Pearce, BW and Brandner, PA, Numerical analysis of base-ventilated intercepted supercavitating hydrofoil sections, Ocean Engineering, 104 pp. 63-76. ISSN 0029-8018 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 Elsevier Ltd.

DOI: doi:10.1016/j.oceaneng.2015.04.072

Abstract

A numerical analysis of the inviscid flow over a family of base-ventilated intercepted hydrofoils is presented using a low-order, non-linear boundary element formulation. The blunt-based section geometry used is based on the NACA 4-digit modified thickness distribution with the addition of a trailing edge fence (or interceptor) for lift production. An optimum section shape, in terms of stable cavity behaviour, was found to be a trade-off between the leading edge minimum pressure and the trailing edge slope. The former affecting the potential for leading edge cavitation and the latter flow separation from the trailing edge. The maximum hydrodynamic efficiency was obtained with a thin section, a small trailing edge slope and operation at a low cavitation number. For a profile with 15% thickness to chord, at zero incidence and an interceptor height of 1% of the chord length, a maximum lift/ drag ratio of around 12 was achieved. The practical realization of this value is likely to be affected by structural limitations, cavity dynamics and serviceability constraints.

Item Details

Item Type:Refereed Article
Keywords:Supercavitation; Ventilation; High-speed hydrofoil; Interceptor; Boundary element method (BEM)
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 (Associate Professor Paul Brandner)
ID Code:100828
Year Published:2015
Web of Science® Times Cited:1
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2015-06-01
Last Modified:2016-02-11
Downloads:0

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