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APPLICATION OF THE TWIN-SKEG SHIP FORM TO A SHALLOW DRAFT SHIP

Chao Sun, Chao Lü, Xue Xia

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Abstract

This paper presents the resistance and propulsive characteristics of the twin-skeg form for a shallow draught passenger ship. Model tests were carried out in shallow water conditions of h/T = 2, 3 and 5 and in the deep water condition. Compared with a conventional stern tunnel form, the new hull form can decrease the residual resistance coefficient by 29.2% and increase the hull efficiency by 10.7% (for outward turning propellers) and by 16.5% (for inward turning propellers). The propulsive power required can be decreased by 24.2% at the design speed of 22km/h.

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What this paper is about

This paper presents the resistance and propulsive characteristics of the twin-skeg form for a shallow draught passenger ship. Model tests were carried out in shallow water conditions of h/T = 2, 3 and 5 and in the deep water condition. Compared with a conventional stern tunnel form, the new hull form can decrease the residual resistance coefficient by 29.2% and increase the hull efficiency by 10.7% (for outward turning propellers) and by 16.5% (for inward turning propellers). The propulsive power required can be decreased by 24.2% at the design speed of 22km/h.

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Available abstract

This paper presents the resistance and propulsive characteristics of the twin-skeg form for a shallow draught passenger ship. Model tests were carried out in shallow water conditions of h/T = 2, 3 and 5 and in the deep water condition. Compared with a conventional stern tunnel form, the new hull form can decrease the residual resistance coefficient by 29.2% and increase the hull efficiency by 10.7% (for outward turning propellers) and by 16.5% (for inward turning propellers). The propulsive power required can be decreased by 24.2% at the design speed of 22km/h.

Key concepts: Hull, Marine engineering, Stern, Waves and shallow water, Deep water, Engineering, Propulsive efficiency, Open water

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