ID 12373
File
Authors
Hara, Yutaka Faculty of Engineering, Tottori University Researchers DB KAKEN
Jodai, Yoshifumi Department of Mechanical Engineering, Kagawa National Institute of Technology (KOSEN)
Okinaga, Tomoyuki Graduate School of Engineering, Tottori University
Furukawa, Masaru Faculty of Engineering, Tottori University Researchers DB KAKEN
Keywords
wind energy
vertical-axis wind turbine
computational fluid dynamics
dynamic interaction
closely spaced arrangements
phase synchronization
wind farm
dryland
Abstract
To investigate the optimum layouts of small vertical-axis wind turbines, a two-dimensional analysis of dynamic fluid body interaction is performed via computational fluid dynamics for a rotor pair in various configurations. The rotational speed of each turbine rotor (diameter: D = 50 mm) varies based on the equation of motion. First, the dependence of rotor performance on the gap distance (gap) between two rotors is investigated. For parallel layouts, counter-down (CD) layouts with blades moving downwind in the gap region yield a higher mean power than counter-up (CU) layouts with blades moving upwind in the gap region. CD layouts with gap/D = 0.5–1.0 yield a maximum average power that is 23% higher than that of an isolated single rotor. Assuming isotropic bidirectional wind speed, co-rotating (CO) layouts with the same rotational direction are superior to the combination of CD and CU layouts regardless of the gap distance. For tandem layouts, the inverse-rotation (IR) configuration shows an earlier wake recovery than the CO configuration. For 16-wind-direction layouts, both the IR and CO configurations indicate similar power distribution at gap/D = 2.0. For the first time, this study demonstrates the phase synchronization of two rotors via numerical simulation
Publisher
MDPI
Content Type
Journal Article
Link
EISSN
19961073
Journal Title
ENERGIES
Volume
14
Issue
8
Published Date
2021-04
Publisher-DOI
Text Version
Publisher
Rights
(C) 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Citation
Hara Yutaka, Jodai Yoshifumi, Okinaga Tomoyuki, et al. Numerical Analysis of the Dynamic Interaction between Two Closely Spaced Vertical-Axis Wind Turbines. ENERGIES. 2021. 14(8). doi:10.3390/en14082286
Department
Faculty of Engineering/Graduate School of Engineering
Language
English
Web of Science Key ut
WOS:000644104100001