A systematic investigation of the effects of various bulbous bows on resistance of fishing boats

Abstract

In this study, Delta (Δ), Nabla (∇) and Elliptical (O) shaped bulbs are implemented ITU Fishing Boats Series hull forms of 148/3, 148/4, 148/8 and 148/9 in order to determthe most appropriate bulbous bow for fishing vessels. Initially, in defined Fn valuComputational Fluid Dynamics (CFD) analyses on four main forms are performed by Realizable k-ε Model and Volume of Fluid (VOF) method. The total resistance valobtained by the CFD analyses and by the existing test results via Froude and Hughes methoare compared and examined. Thus, the method and reference values of CFD analyses determined for the hull forms with bulbs which do not have test results. Subsequently, CFD results of frictional resistance, pressure resistance and total resistance values for acthulls and hulls with bulbs are compared. Following the examination of results in terms of L/B and bulb types, it is determined that the elliptical bulb type is the most suitable bulb for the fishing vessels.