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 speed.

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.

 
 
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