Accession Number : AD0468603

Title :   FORCE CHARACTERISTICS OF RESTRAINED, NATURALLY VENTILATED HYDROFOILS IN REGULAR WAVES.

Descriptive Note : Interim rept.,

Corporate Author : MINNESOTA UNIV MINNEAPOLIS ST ANTHONY FALLS HYDRAULIC LAB

Personal Author(s) : Wetzel, J. M. ; Foerster, K. E.

Report Date : MAR 1965

Pagination or Media Count : 53

Abstract : Experimental data were obtained for the steady force characteristics of naturally ventilated hydrofoils of finite span with trailing edge flaps. The foils were submerged below a free surface. The data were compared with theory corrected for effects of finite span. Investigations were also made of the oscillatory lift and drag forces for restrained, naturally ventilated foils of finite span moving through regular head and following seas. The experimental data for the amplitude of the oscillatory forces were essentially independent of the reduced frequency, based on chord, up to about 1.1. Cavity wash-off due to wave-induced changes in the angle of attack was also investigated. (Author)

Descriptors :   (*HYDROFOILS, VENTILATION), HYDRODYNAMIC CONFIGURATIONS, MODEL TESTS, ANGLE OF ATTACK, LIFT, DRAG, CAVITATION, MEASUREMENT, INSTRUMENTATION, FLAPS(CONTROL SURFACES).

Distribution Statement : APPROVED FOR PUBLIC RELEASE