CAVITATION ANALYSIS AND HYDRODYNAMIC
DRAG REDUCTION BY CAVITATION
MECHMATH fits numerically the shapes
of hulls, hydrofoils, blades, etc. to keep stable cavities
under certain flow conditions, providing significant
drag reduction (improvement of lift to drag ratio).
The shape of the developed hydrofoil
OK-2003 (bottom) and its measured normalized drag vs.
cavitation number (top). The cavitation number
is proportional to minus the second power of a ship’s
Cavitation inception and
growth over propeller blades and torpedo hulls are
reliably predicted with our unique method and computer
codes. Such predictions can be employed for both design
and extrapolation of model test data.
Scale effect of cavitation inception
number si for the torpedo models of the same shape.
Curves show our theoretical results for different calibers
of torpedo models, symbols show experimental data for
the same models.