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Martin Moreau, Grégory Germain and Guillaume Maurice
The cost effective design of tidal turbines requires a good estimation of the loading cycles and their extrema that are related to the unsteady fluctuation of the current velocity. Apart from the ambient turbulence, the main source of velocity fluctuatio...
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Ketut Wirtayasa, Chun-Yu Hsiao and Nien-Che Yang
Commonly, electrical energy is generated by using non-renewable energy such as natural gas, coal, and oil. As electrical energy is a basic asset for the development of a region, its utilization is increasing every year, which causes the existence of non-...
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Palanisamy Mohan Kumar, Krishnamoorthi Sivalingam, Teik-Cheng Lim, Seeram Ramakrishna and He Wei
The objective of the current review is to present the development of a large vertical axis wind turbine (VAWT) since its naissance to its current applications. The turbines are critically reviewed in terms of performance, blade configuration, tower desig...
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Nicoletta Franchina, Otman Kouaissah, Giacomo Persico and Marco Savini
The paper presents the results of a computational study on the aerodynamics and the performance of a small-scale Vertical-Axis Wind Turbine (VAWT) for distributed micro-generation. The complexity of VAWT aerodynamics, which are inherently unsteady and th...
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Guangnian Li, Qingren Chen and Hanbin Gu
An unsteady boundary element model is developed to simulate the unsteady flow induced by the motion of a multi-blade vertical axis turbine. The distribution of the sources, bound vortices and wake vortices of the blades are given in detail. In addition, ...
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Yong Ma, Chao Hu, Yulong Li, Lei Li, Rui Deng and Dapeng Jiang
The goal of this manuscript is to investigate the influence of relative distance between the twin rotors on the hydrodynamic performance of the vertical axis twin-rotor tidal current turbine. Computational fluid dynamics (CFD) simulations based on commer...
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Yong Ma, Chao Hu, Yulong Li, Lei Li, Rui Deng and Dapeng Jiang
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Qian Cheng, Xiaolan Liu, Ho Seong Ji, Kyung Chun Kim and Bo Yang
Vertical axis wind turbines (VAWTs) are gradually receiving more and more interest due to their lower sensitivity to the yawed wind direction. Compared with straight blades VAWT, blades with a certain helicity show a better aerodynamic performance and le...
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Samir Deshmukh,Sagar Charthal
Pág. 286 - 294
Wind energy is the kinetic energy associated with movement of large masses of air. These motions result from uneven heating of atmosphere by sun creating temperature, density, pressure differences. It is an indirect form of solar energy The device used t...
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Eleni Douvi, Dimitra Douvi, Dionissios Margaris and Ioannis Drosis
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Andrea Alaimo, Antonio Esposito, Antonio Messineo, Calogero Orlando and Davide Tumino
To analyze the complex and unsteady aerodynamic flow associated with wind turbine functioning, computational fluid dynamics (CFD) is an attractive and powerful method. In this work, the influence of different numerical aspects on the accuracy of simul...
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Morgan Rossander, Eduard Dyachuk, Senad Apelfröjd, Kristian Trolin, Anders Goude, Hans Bernhoff and Sandra Eriksson
Unique blade force measurements on an open site straight-bladed vertical axis wind turbine have been performed. This paper presents a method for measuring the tangential and normal forces on a 12-kW vertical axis wind turbine prototype with a three-blade...
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Andrew Shires
There has been a resurgence of interest in the development of vertical axis wind turbines which have several inherent attributes that offer some advantages for offshore operations, particularly their scalability and low over-turning moments with better a...
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Wenping Luo, Weiqin Liu, Meng Yang, Shuo Chen, Xuemin Song and Weiguo Wu
Operating Offshore Floating Vertical Axis Wind Turbines (OF-VAWT) have the potential to perform well in the deep-sea area. Some researchers gave performance prediction by developing simplified computing models. However, these models have imperfections in...
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Chao Hu, Chenxuan Tang, Chenyang Yuwen and Yong Ma
For a floating tidal current power station moored in the sea, the mutual interactions between the carrier and the turbine are pretty complex. Current simulation methods based on potential flow theory could not consider the complicated viscous effects bet...
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Minh N. Doan, Yuriko Kai, Takuya Kawata and Shinnosuke Obi
Recent developments in marine hydrokinetic (MHK) technology have put the cross-flow (often vertical-axis) turbines at the forefront. MHK devices offer alternative solutions for clean marine energy generation as a replacement for traditional hydraulic tur...
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Minh N. Doan, Takuya Kawata and Shinnosuke Obi
Cross-flow hydrokinetic turbines have sparked interest among fluid dynamicists for their potential for power enhancement in paired configuration. Following the first part of a laboratory-scaled turbine wake measurement project, this second part presents ...
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Amani I. Altmimi, Mustafa Alaskari, Oday Ibraheem Abdullah, Ahmed Alhamadani and Jenan S. Sherza
Wind energy is considered one of the most important sources of renewable energy in the world, because it contributes to reducing the negative effects on the environment. The most important types of wind turbines are horizontal and vertical axis wind turb...
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Minh N. Doan, Yuriko Kai and Shinnosuke Obi
This article proposes an experimental apparatus design to measure the power of a cross-flow marine hydrokinetic turbine system operating in a laboratory water tunnel. Data, from one Hall sensor output signal, was processed to capture the three types of t...
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