Turning motion of multi-connection cross-flow vertical axis offshore wind turbines tension moored at a single point

Iwamatsu, Saika; Kusanagi, Kazuma; Srinivasamurthy, Sharath et al.

Journal of Ocean Engineering and Marine Energy, 2023, 9, 515-529

Number of Access:322（2025-08-16 04:13 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/91369

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Title
Turning motion of multi-connection cross-flow vertical axis offshore wind turbines tension moored at a single point
Creator
CreatorName
Iwamatsu, Saika
CreatorName
Kusanagi, Kazuma
CreatorName
Srinivasamurthy, Sharath
NRID
1000050302758 1000050302758
researchmap permalink
read0081454 read0081454
Scopus Author ID
7202932279 7202932279
CreatorName
Iijima, Kazuhiro
NRID
1000050302625 1000050302625
CreatorName
Ikoma, Tomoki
NRID
1000000470055 1000000470055
CreatorName
Nihei, Yasunori
Subject
Model scale experiment
Single point mooring
Turning motion
Vertical axis wind turbine
Description
This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s40722-023-00281-2
Abstract
This study proposes a multi-connection cross-flow vertical axis wind turbine, an innovative device to supply electric power in aquaculture farms. The device is a new type floating offshore wind turbine consisting of two independent wind turbine floats and a mooring float set in a straight line. A single-point mooring system with tension is utilized at the mooring float, which allows the wind turbine floats to turn around the moored point. However, there are various challenges to this new concept for its practical application mainly related to turning motion about the moored point. Therefore, the focus of this study is to understand the turning mechanism of the proposed FOWT through dedicated water tank experiments and numerical simulations. As a concept demonstration, two cross-flow wind turbines were mounted on the wind turbine floats and turning motion characteristics about the moored point were observed. A prototype model was built with a model scale of 1/36 using Froude scaling assuming rough weather conditions at the aquaculture farm. Wind speed of 35 m/s, wave height of 0.75 m, and wave period of 5–7.5 s are the assumed environmental conditions in the actual model. Free yawing tests were conducted in only-wind, only-wave and combined wind–wave conditions. Further, a numerical simulation considering the wind loads acting on the turbines is developed. It is found that the wind turbine floats turn to a position where the wind loads acting on the left and right sides of the moored point are balanced. The numerical simulation reproduced the turning motion within an error of 10.
Publisher
Springer Science and Business Media Deutschland GmbH
Source Title
Journal of Ocean Engineering and Marine Energy
Volume (Issue)
9
Page
515-529
Date of Issued
2023-04-27
Language
English
Handle URL
https://hdl.handle.net/11094/91369
PISSN
21986444
eISSN
21986452
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1007/s40722-023-00281-2
Access Rights
open access
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article