ASSESSING BI-STABLE VENTILATION FOR SURFACE-PIERCING HYDROFOILS THROUGH NUMERICAL SIMULATION
Abstract
This paper studies the inception and stability of ventilation in bi-stable conditions. It is shown that spontaneous inception depends on the path to the steady state. Therefore, it is more relevant to provoke ventilation by artificial perturbation and to consider its stability, than to simulate spontaneous inception. At low angles of attack, the simulated ventilation is eliminated by a wave crest breaking and closing the ventilation pocket from the top. The tests show that this behaviour depends on the detailed physical and numerical modelling of the water sheet which forms the edge of the ventilating pocket.
Domains
Engineering Sciences [physics]
Origin : Files produced by the author(s)
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