A Multiple Actuator Block model for vertical axis wind turbines |
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| Affiliation: | 1. Departamet d’Enginyeria Mecanica, Universitat Rovira i Virgili, Tarragona, Spain;2. Center of Computational Engineering and Integrated Design (CEID), Department of Mathematics and Physics, Lappeenranta University of Technology, Lappeenranta, Finland;1. Department of Electrical Engineering, M.I.T.S., Gwalior, India;2. Department of Electrical Engineering, IIT Delhi, India;1. Institut national de la recherche scientifique, Centre Eau Terre Environnement, 490 rue de la Couronne, Québec, QC, G1K 9A9, Canada;2. Département de génie mécanique, École de Technologie Supérieure, 1100 rue Notre-Dame Ouest, Montréal, QC, H3C 1K3, Canada;1. Department of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, PR China;2. Zhejiang Tianneng Energy Technology Co., Ltd., Changxing County, Zhejiang Province 313100, PR China;1. Department of Electrical Engineering, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia;2. Electrical & Computer Engineering, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada;1. School of Engineering, University of Portsmouth, UK;2. Fluid Structure Interaction Research Group, Faculty of Engineering and the Environment, University of Southampton, UK |
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| Abstract: | In this paper a new model to predict the wake of vertical axis wind turbines (VAWT) is proposed and analysed. The model is based on the actuator disk and the Double Multiple Stream Tube methods. Specifically, the model, denoted as Multiple Actuator Block, is based on the definition, inside the computational domain, of multiple parallelepipedic blocks distributed along the path of the blades. Volumetric momentum sinks are imposed in these blocks to model the effect of the blades on the flow. To analyse the performance of the model a VAWT with three NACA0022, for which numerical and experimental results are available in the literature, has been considered. Different types of simulations with the Multiple Actuator Block model have been carried out and have been compared with a complete finite volume simulation using the sliding mesh technique. This simulation requires about ten times more CPU time than the simulations using the Multiple Actuator Block model. It has been found that the large scale features of the far wake can be reproduced using the Multiple Actuator Block model applying in the block the forces, obtained from the complete finite volume simulation or obtained from a boundary-layer type code, when the blade is inside the block. |
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| Keywords: | Multiple Actuator Block VAWT Actuator disk Double multiple stream tube CFD |
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