Transverse Viscous Loads in Maneuvering

Abstract

The main objective of the thesis is to improve the estimation of transverse viscous loads in ship maneuvering. The traditional approach for calculating the transverse viscous loads in most of the maneuvering models is based on empirical methods. 2D+t methods offer a rational method for estimating these loads. A basic input necessary for applying 2D+t method is the transient drag coefficient curves. Hence, as a part of the thesis work, both an experimental and numerical approach is taken to obtain the sectional transient drag coefficients of ship-shaped sections. Finally, these are used in a two-time scale maneuvering code to simulate turning circle maneuvers of KCS and DTC vessel and the result is compared against available experimental data.