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Carlo Giorgio Grlj, Nastia Degiuli, Andrea Farkas and Ivana Martic
The present study aims to investigate the scale effects of the open water propeller performance using computational fluid dynamics (CFD). The results are presented for the propeller which was previously 3D scanned and digitized. The results obtained usin...
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Da-Qing Li, Per Lindell and Sofia Werner
Unexpected low value of the relative rotative efficiency ?R is sometimes noted when scaling the towing tank model-test result with the ITTC-78 method to obtain the propulsive efficiency factors of propellers. The paper explains the causes of this phenome...
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Kwang-Leol Jeong, Sunho Park and Se-Min Jeong
When performing simulations using computational fluid dynamics, the grid systems in the viscous boundary layer regions are important because the velocity and pressure change very rapidly in these regions. Especially for the turbulent flows, thin grids sh...
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Mobin Masoomi and Amir Mosavi
This paper aims to assess a new fluid?structure interaction (FSI) coupling approach for the vp1304 propeller to predict pressure and stress distributions with a low-cost and high-precision approach with the ability of repeatability for the number of diff...
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Amal Amaghnouje, Hamza Mechchate, Imane Es-safi, Amal A. Alotaibi, Omar M. Noman, Fahd A. Nasr, Mohammed Al-zharani, Pierfrancesco Cerruti, Anna Calarco, Hinde EL Fatemi, Andriy Grafov and Dalila Bousta
Marjoram (Origanum majorana L.) infusion has been used as folk medicine against depression and anxiety. However, no studies have been carried out yet to prove those activities scientifically. In this study, the anxiolytic, antidepressant-like effects, an...
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Shlomit Valensi and Alon Gany
Open-sea testing of a two-phase marine ramjet vehicle has been conducted. This experimental phase was accomplished following comprehensive theoretical research. The concept of two-phase marine ramjet propulsion consists of a submerged propulsor acquiring...
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Lori Bradford, Kwok P. Chun, Rupal Bonli and Graham Strickert
Currently, there are no tools that measure improvements in levels of empathy among diverse water stakeholders participating in transboundary decision-making. In this study, we used an existing empathy scale from clinical psychology during an Experimental...
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Salman A. M. Fadl-Elmola, Cristian Moisescu Ciocan and Ioana Popescu
Smoothed particle hydrodynamics (SPH) is a Lagrangian mesh free particle method which has been developed and widely applied to different areas in engineering. Recently, the SPH method has also been used to solve the shallow water equations, resulting in ...
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Jan Blotnicki, Pawel Jarzembowski, Maciej Gruszczynski and Marcin Popczyk
The application of UAV to acquire data on the morphometry of frazil ice floe in motion is demonstrated in the measurements conducted in the area of the Wroclaw Water Junction at the Opatowice weir on the Odra River (Poland). Image processing was performe...
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Tianyu Yang, Xin Wang and Zhengjiang Liu
With the aim to solve the problem of missing or tampering of ship type information in AIS information, in this paper, a novel ship type recognition scheme based on ship navigating trajectory and convolutional neural network (CNN) is proposed. Firstly, ac...
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Zhen Liu, Xinfu He and Cuiying Zhou
As a typical representative of red beds, the softening and disintegration of red sandstone when it encounters water is an important cause of initiated engineering disasters. However, research on the softening of this kind of rock has mainly focused on th...
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The aim of this work was to design and build a control system to control the performance of the Pelton wheel and synchronous generator system at different upstream water flow and electrical load conditions. The turbine output power is determined by the u...
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Youping Fan, Dai Zhang and Jingjiao Li
The aim of this work was to design and build a control system to control the performance of the Pelton wheel and synchronous generator system at different upstream water flow and electrical load conditions. The turbine output power is determined by the u...
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Timothy O. Hodson, Keith J. Doore, Terry A. Kenney, Thomas M. Over and Muluken B. Yeheyis
Streamflow is one of the most important variables in hydrology, but it is difficult to measure continuously. As a result, nearly all streamflow time series are estimated from rating curves that define a mathematical relationship between streamflow and so...
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David Beck and Paul Uwe Thamsen
Especially in the field of sewage pumps, the design of radial impellers focuses not only on maximum efficiency but also on functionality in terms of susceptibility to clogging by fibrous media. In general, the efficiency of sewage impellers is significan...
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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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Chunhui Wang, Jiaan Wang, Chao Wang, Zeping Wang and Yuan Zhang
The marginal ice zone (MIZ) is located at the junction of ice-covered areas and open water, where waves cause ice floes to break up and change their state of motion, thus threatening the safety of ships navigating the ice. This study employs the Structur...
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Yiyi Xu, Jun Zhao, Shuai Sun and Pengfei Liu
The effect of vibration and oscillation of an instrumented testing apparatus on horizontal axis tidal turbine rotor energy generation performance was examined and analyzed. Enforcement struts and an accelerometer were installed to measure and record vibr...
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Qimeng Liu, Hao Chen, Zhenhua Wang, Qu He, Linke Chen, Weikun Li, Ruipeng Li and Weicheng Cui
Recent research on robotic fish mainly focused on the bionic structure design and realizing the movement with smart materials. Although many robotic fish have been proposed, most of these works were oriented toward shallow water environments and are most...
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Nicola Lolli, Alessandro Nocente and Steinar Grynning
The influence of different control strategies on the user?s satisfaction in cell offices was studied in a full-scale facility in Trondheim, Norway. Eleven participants used two test cells as a workspace and answered a computer-based questionnaire for rep...
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