Economic pressures and regulatory requirements have brought about a great interest in improving ship propulsion efficiency. This can be exercised by installing Energy Saving Devices (ESD) such as Propeller Boss Cap Fins (PBCF). This paper demonstrates an approach for optimising PBCF by using Computational Fluid Dynamics (CFD) analysis. The conducted Reynolds-averaged Navier-Stokes (RANS) CFD open water model tests were validated by comparison with experimental data until the simulation was deemed satisfactory within the capabilities and limitations of the model. A design and optimisation procedure was defined to analyse the impact of ESDs on propeller efficiency and then used to evaluate the influence of alternative geometric parameters and locations of the PBCF on the hub. This analysis was done at full scale using high fidelity CFD-based RANS methods. Outcomes of the study include a design and optimisation process that can be used for the analysis of other ESDs on the market. The influences of various PBCF geometry were examined with optimal solutions presented for the analysis case. Results indicated a net energy efficiency improvement of 1.3% contributing to a substantial minimisation of cost and energy consumption. A reduction in the hub vortex was also clearly identified and presented

Self-esteem affects learning, performance, self-worth, and quality of life, particularly in persons with dyslexia, or rather how students with dyslexia are mis/understood and supported. Dyslexia does not only affect literacy but also affects emotional well-being. Webb concludes that for children to feel successful, they need to become aware of their unique learning strengths to apply them effectively to strengthen weaknesses. Drama and Performance Ethnography (PE) can be support strategies. Workshops were carried out with a group of adolescent youngsters with dyslexia. The aim was to provide a safe environment where they could find their voice and gain self-confidence through drama and PE to provide opportunities to address self-esteem and to provide insights for policies and practice. This article intends to listen to these youngsters’, also co-authors, and their parents’ narratives of this experience.

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Economic pressures and regulatory obligations have brought about a great interest in improving ship propulsion efficiency. This has motivated and directed research to improve the hydrodynamic performance of a vessel thus seeking the development and generation of optimised designs. When analysing flow characteristics of a vessel, particular attention is given to analysing its wake field and stern flow characteristics. For the detailed analysis of the wake flow field, a Wake Analysis Tool (WAT) was developed within the programming environment of a commercial CAE tool. The WAT is based on a framework that enables easy interaction to an external CFD solver reading flow field properties from a generic csv file. The wake flow field is visualised and analysed in schematic form according to the standard and customized (i.e. the British Ship Research Association criteria) wake analyses. By coupling the CAE tool with a commercial flow solver, an example was given how to use the wake tool in a fully automated simulation process. Finally, the wake tool was used to analyse the nominal propeller wake flow of the Japan Bulk Carrier (JBC) thus showing how it can be efficiently applied to a set of numerical results.

This paper supports decarbonisation in the marine industry by demostrating that a proper design methodology and state of the art technologies can significantly reduce greenhouse gas emissions. The paper demonstrates the possibility of reducing the environmental footprint of Marine High-Speed passenger transportation with innovative propulsion plant designs. The challenging solutions to designing a high-speed hybrid catamaran ferry, that satisfy design criteria and requirements, are presented and applied to a realistic case study. The design process investigated the potential electrification of the vessel to reduce its carbon footprint without compromising function and performance and a quantitative comparison to a conventional propulsion plant was carried out and presented.