A Study on the Manoeuvrability as Function of Stern Hull Form in Shallow Water

Title & Authors
A Study on the Manoeuvrability as Function of Stern Hull Form in Shallow Water
Lee, Sungwook;

Abstract
A numerical simulation studies were performed to investigate a manoeuvring characteristics as function of stern hull form with the mathematical model. In order to consider the effect of the stern hull form and obtain the manoeuvring characteristics, a parameter($\small{C_{wa}}$) which is aft. water plane area coefficient is modified. Because modifying $\small{C_{wa}}$($\small{{\pm}2%}$) means that the stern hull form is modified to V-type or U-type, the numerical simulation was performed with this modified $\small{C_{wa}}$. A changing trend for the manoeuvring characteristics not only in deep water but also in shallow water such as directional stability, turning and zig-zag was investigated and presented as the results. Present study showed that the manoeuvrability in shallow water largely changed when the draught and water depth ratio(=d/H) become 0.5, and the stern hull form can affect to the manoeuvrability of a vessel navigating in restricted water depth. In addition, it showed that approaching the stern hull to U-type makes the advance and tactical diameter of turning motion large and the overshoot angle of zig-zag motions small. Otherwise, it showed approaching the stern hull form to V-type makes the advance and tactical diameter of turning motion small and the overshoot angle of zig-zag motions large in the present study.
Keywords
Manoeuvring;Shallow water;Zig-zag;Turning;CFD;
Language
Korean
Cited by
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