2020 Volume 76 Issue 2 Pages I_360-I_365
Large vessels are equipped with large thrusters and jet flow caused by thrusters leads to the scour around quay. However, there are few studies about the velocity around quay caused by jet flow and the relation between the position of the thruster and quay or sea bed. In addition, existing equations, known as Dutch method and German method, for predicting bottom velocity from jet flow are based on the limited experiments and the calculated values from these equations have large gap each other.
In this study, we performed a few experiments and numerical simulations to discuss the relation between the relative position of the thruster from quay and sea bed and bottom velocity from jet flow and scour shape. As a result, we found out that the predicted bottom velocity from proposed equations underestimates the experiment depending on the conditions, and scour shape has strong relation between the collision of jet flow and quay in Dutch formulation.
