FIELD: shipbuilding. SUBSTANCE: device has streamlined body with continuous pressure face and convex suction face with system of slotted nozzles hydraulically connected with interior of hydrofoil and with hydraulic supercharger through passages in struts. When liquid is fed through nozzles, high-velocity flat flow is formed on upper surface of hydrofoil which is directed tangentially to hydrofoil surface, thus providing for attached flow around hydrofoil. EFFECT: enhanced hydrodynamic property of hydrofoil. 2 dwg
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