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Tunbiao Wu, Ronghui Li, Qinglong Chen, Guiyuan Pi, Shijie Wan and Qiao Liu
A methodology of mathematical testing is proposed for a ship with twin azimuth thrusters based on numerical calculations. An unmanned surface vessel (USV) powered by two azimuth thrusters is considered, which is a model-scale configuration. The Ship Mane...
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Giacomo Nicorelli, Diego Villa and Stefano Gaggero
A pre-swirl fin (PSF), pre-swirl duct (PSD) and wake-equalizing duct (WED) energy-saving devices (ESD) are designed for the Duisburg Test Case (DTC). To this aim, a simulation-based design optimization method, combining RANSE analyses (ship resistance) w...
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José Enrique Gutiérrez-Romero, Samuel Ruiz-Capel, Jerónimo Esteve-Pérez, Blas Zamora-Parra and Juan Pedro Luna-Abad
The real resistance that a ship must face when it is navigating in ice floes is the key factor for knowing the necessary power and the required engine size. The aim of this work is to provide valuable data to help other research in which numerical framew...
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Yeong-Ju Go, Joon-Hwan Bae, Jaeha Ryi, Jong-Soo Choi and Chung-Ryeol Lee
The demand for new propeller designs has increased alongside the development of new technology, such as urban aircraft and large unmanned aerial vehicles. In order to experimentally identify the performance of a propeller, a wind tunnel that provides the...
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Kunyu Han, Xide Cheng, Zuyuan Liu, Chenran Huang, Haichao Chang, Jianxi Yao and Kangli Tan
Maneuverability, which is closely related to operational performance and safety, is one of the important hydrodynamic properties of an underwater vehicle (UV), and its accurate prediction is essential for preliminary design. The purpose of this study is ...
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Maximilian Müller, Malte Woidt, Matthias Haupt and Peter Horst
An important element of the process of aircraft certification is the demonstration of the crashworthiness of the structure in the event of an emergency landing on water, also referred to as ditching. Novel numerical simulation methods, that incorporate t...
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Roman Gabl, Bernhard Gems, Florian Birkner, Bernhard Hofer and Markus Aufleger
An unexpected and massive redistribution of fine sediment in a large Alpine reservoir was triggered by a further lowering of the water level to conduct maintenance work. This caused the need of a total redesign of the existing head race intake for a high...
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Johannes Palm, Claes Eskilsson, Lars Bergdahl and Rickard E. Bensow
This paper analyses the nonlinear forces on a moored point-absorbing wave energy converter (WEC) in resonance at prototype scale (1:1) and at model scale (1:16). Three simulation types were used: Reynolds Averaged Navier?Stokes (RANS), Euler and the line...
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