Wing Sections for Hydrofoils—Part 1: Symmetrical Profiles

Abstract

NACA 16-series wing sections have been extensively applied to U.S. hydrofoil craft. However, this series of wing sections was developed around 1940. Since then new airfoil sections have been continuously investigated both theoretically and experimentally. By means of recently developed methods of calculation for boundary-layer and profile theory, it is possible to determine, in a simple way, profiles with fixed characteristics of pressure distributions and to carry out boundary-layer calculations. Three classes of new wing sections with improved hydrodynamic characteristics in terms of cavitation inception have been successfully developed. It is shown that each series of profiles has its own merit. The choice of a wing section can be made only when the operational requirements of the craft are specified.

A review on the technologies, design considerations and numerical models of tidal current turbines

“…Banos and his colleagues [146] performed an excellent review paper of the current state of the art in computational optimization approaches applied to renewable and sustainable energy. In order to design a hydrofoil, many techniques can be employed such as the inverse design approach, suggested by Lighthill [147] and broadly progressed by Eppler and Drela [148]. Despite its great employ, there are many inconveniences related with this approach.…”

Amphibious Aircraft Developments: Computational Studies of Hydrofoil Design for Improvements in Water-Takeoffs

“…In the case of a ventilation analysis for a hydrofoil, the depth of submergence in water from sea level is the appropriate measure. Early work to optimize the hydrodynamics of hydrofoils did not consider cavitation [33], though most subsequent works considered it [18,20,[34][35][36]. These works mainly used potential flow as their bases.…”

“…Experiments showing the effectiveness of hydrofoils dated as early as 1861 by Thomas Moy [12], in 1907 and 1914 by the Wright brothers [3], and in 1937-1940 by Sottorf [13], among many others. Most modern studies of hydrofoils relate to marine and naval technologies, including unmanned surface vehicles (USV) [14][15][16], aquatic unmanned aerial vehicle (AquaUAV) [17], turbomachinery [18], naval propellers [19], the propulsion of marine vehicles [20,21], or axial-flow pumps [22]. Hydrofoil boats, such as the "Raketa" developed in Russia in 1957, were manufactured and used for commercial transporation [23].…”

A new generation of inverse shape design problem in aerodynamics and aerothermoelasticity: concepts, theory and methods

“…Since most TM and aircraft must operate at offdesign points, it is of particular importance to develop a new multipoint design theory and methods that ensure that the designed aerodynamic shapes have favorable performance in as wide as possible range of off-design conditions. To the author's knowledge, in the literature there exists only one exact multipoint airfoil design theory suggested by Eppler and Somers (1980) and already used for designing hydrofoils and ship propellers (Eppler and Shen, 1985;Nakazaki et al, 1986). Recently, it has been improved by Selig and Maughmer (1992) in some aspects, mainly:…”