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Due
to the nature of water, which vaporises at low pressure or equivalently,
at high velocity, relatively little attention needs to be paid
to cavitation when designing ship appendages for speeds up to
about 30 knots, while at higher speed it becomes increasingly
important. Above 50 knots it is imperative to fully address cavitation,
unless most unpleasant problems are to appear in the form of erosion,
lift force breakdown, excessive drag, and noise and vibration.
Through its unique cavitation and ventilated flow know-how, and
proprietary design and simulation software, Humphree is able to
offer a range of custom designed low-drag appendages which are
guaranteed not to cause cavitation problems. The current range
includes:
•
Sub-cavitating stabilising fins (below 40 knots)
• Base-ventilated stabilising fins (above 40 knots)
• Sea chest inlets
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