IS16 - Physics and Simulation of Hydrofoils
Hydrofoils are lift-generating surfaces operating below the free surface. By creating
forces and moments, lifting surfaces are used for the control and stabilisation of ships.
Furthermore, hydrofoils can create a vertical lift able to support the weight of a ship,
which reduces the ship’s drag by decreasing the wetted area of the ship, but also by
decreasing the wave added resistance. Seakeeping capabilities can be improved as the
ship’s response to waves is reduced.
The flow around hydrofoils is characterised by specific physical effects, due to the high
pressure differences associated with a lifting surface in close proximity to the free
surface. This leads to a strong dependence of the forces on the hydrofoil immersion, to
the generation of trailing vortices and their interaction with the surface, to a risk of
ventilation, etc. The slender structure of a hydrofoil is likely to deform, which leads to
changes in the performance and a possibility of oscillations occuring. Furthermore, the
high speeds often involved with hydrofoils make cavitation a serious risk.
Following two earlier editions at previous MARINE conferences, the objective of this
mini-symposium is to study how these particular physics influence the design and
performance evaluation of hydrofoils. The session is naturally cross-disciplinary, and
contributions are invited on such different subjects as numerical simulation techniques
and results, physical phenomena like ventilation, cavitation and fluid-structure
interaction, experimental techniques and analysis of experiments, and (automatic)
design optimisation. Any other topics related to hydrofoils are also appreciated.