Charles Badoe

The Fluid Structure Interactions group (University of Southampton) has been extensively involved in many research projects focusing on computations of ship wake field and the interactions between the propeller, rudder and the hull. Notable examples are works by Phillips et al., (2009), Banks et al., (2010), Badoe et al., (2013) and Winden et al., (...

CFD models of marine turbines often assumes constant depth. However, the presence of seabed bathymetry creates a significantly complex flow environment. In this paper, the bathymetry of a potential tidal deployment site is used in the development of a CFD model. Both URANS and DES turbulence approach for simulating marine currents around tidal ener...

Coupled blade element momentum-computational fluid dynamic (BEM-CFD) approaches have been extensively used to study tidal stream turbine performance and wake development. These approaches have shown to be accurate when compared to tests conducted in tow-tanks or in regulated flumes with uniform flows across the turbine. Whilst such studies can be v...

Numerical models are used for design and evaluation of tidal energy converters, helping to increase their appeal as significant contributors in the generation of low carbon energy. In this study, we quantify the improvement in predicted structural load variability achieved by incorporating more detailed consideration of foil shape and Reynolds effe...

A generalised actuator disk-computational fluid dynamics (GAD-CFD) model is used to conduct simulations on a 14-turbine array arranged in two different configurations. Firstly, simulations of a regular (staggered) and modified (dual) configurations are conducted in straight flow conditions to understand the hydrodynamics around devices and evaluate...

This research aims to implement a three-dimensional regional scale numerical model within a region of the Irish Sea (between 52.808˚N and 53.842˚N) that is suitable for turbine array implementation and impact assessment. This research is based on a three-dimensional wave-current-sediment fully coupled oceanographic model (FVCOM), and modifications...

Simulations of the flow over a heaving NACA0012 wing are conducted to study the effects of the separated flow phenomena for a pre-stall and post-stall wing condition. An extensively validated high fidelity large-eddy simulation (LES) approach is used to examine the unsteady aerodynamic loads and flow structures at Reynolds number Re c = 20,000. We...

Simulations of the flow over a heaving NACA 0012 wing are conducted to study the separated flow phenomena for a pre-stall and post-stall wing con- dition. An extensively validated high fidelity large-eddy simulation (LES) approach is used to examine the unsteady aerodynamic loads and flow struc- tures at Reynolds number Re c = 2×10 4 based on the c...

It is the complex flow at the stern of a ship that controls the overall propulsive efficiency of the hull-propeller-rudder system. This work investigates the different analysis methodologies that can be applied for computing hull-propeller-rudder interaction. The sensitivity into which the interaction between the propeller and rudder downstream of...

The ability to predict the powering performance of twin skeg LNG ship is a complex endeavour requiring appraisal of operating conditions and hydrodynamic analysis to arrive at a suitable stern design solution. Inherently coupled with the stern design process is the design optimization, namely the selection of most suitable geometrical parameters of...

The operation of a marine propeller dominates the flow interaction effects and alters the resistance on an upstream hull and the forces on a downstream rudder. A study is carried out into how these effects can be resolved by comparing four different methods. A classical prescribed body force approach in which an averaged nominal wake is used as inp...

The prediction of a ship’s wake field and self-propulsion capabilities has traditionally been centered on experiments; however with the advancement in modern computing power, this can be achieved through the use of computational methods. An advantage with the use of CFD is its ability to provide insight into flow characteristics close to the wall,...

The operation of the propeller dominates the flow interaction effects on the upstream hull and a downstream rudder. An investigation is carried out into the sensitivity with which these effects can be resolved when an angle of drift is applied as well as the length of an upstream body is varied. The computed results are compared to a detailed wind...

A film of iridium and tin dioxides doped with antimony oxide (IrO2-SnO2-Sb2O5) was deposited onto Ti mesh and plate substrates by the Pechini method. The electrode surface morphology and composition were characterized by SEM-EDS. The ternary oxide coating was used for the anodic oxidation of methyl orange (MO) azo dye. Linear sweep voltammetry was...

An overview is given of current research in maritime CFD using the open source flow solver OpenFoam through examples of unsteady propulsors representations, free surface capture and hull-propulsor-rudder interaction for energy efficient shipping. Fundamental unsteady flow as hydroacoustic sources on a 2D foil is also solved.

The importance of a rudder cannot be understated; although relatively small, the hydrodynamic forces and moments developed on it are essential in the assessment of the manoeuvring characteristics of a ship. Additionally, ship rudders are almost always placed downstream of the propeller so they can take advantage of the increased local velocity due...

Reducing the fuel consumption of shipping presents opportunities for both economic and environmental gain. From a resistance and propulsion standpoint, a more holistic propeller/hull/rudder interaction strategy has the potential to reduce fuel consumption, and minimise the risk of cavitation. The goal of this paper is to demonstrate that powering r...