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Force Characteristics of Restrained, Naturally Ventilated Hydrofoils in Regular Waves

J. M. Wetzel / K. E. Foerster

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)

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Force Characteristics of Restrained, Naturally Ventilated Hydrofoils in Regular Waves

J. M. Wetzel / K. E. Foerster

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)

Force Characteristics of Restrained, Naturally Ventilated Hydrofoils in Regular Waves

J. M. Wetzel / K. E. Foerster

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)

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Title:

Force Characteristics of Restrained, Naturally Ventilated Hydrofoils in Regular Waves

Contributors:

J. M. Wetzel (author) / K. E. Foerster (author)

Publication date:

1965

Size:

53 pages

Type of media:

Report

Type of material:

No indication

Language:

English

Keywords:

Marine Engineering , Hydrofoils , Ventilation , Hydrodynamic configurations , Model tests , Angle of attack , Lift , Drag , Cavitation , Measurement , Instrumentation , Flaps(Control surfaces)

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