九州大学 研究者情報
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基本情報 研究活動 教育活動 社会活動
劉 盈溢(りゆう いんい) データ更新日:2019.07.29



主な研究テーマ
後流の影響を考慮した風車の解析モデリング、ウィンドファーム最適配置に関する研究
キーワード:後流解析、ウィンドファーム
2019.04~2022.06.
海洋波エネルギー装置の数値モデリング
キーワード:海洋波エネルギー、複数装置、数値モデリング
2018.04~2022.06.
浮体式洋上風車の動解析、タワーの空力特性が洋上風車性能に及ぼす影響の調査
キーワード:浮体式、タワー、空力特性
2017.07~2022.06.
海洋構造物との水波の相互作用に関する研究、海洋流体力学における高効率計算コードの開発
キーワード:海洋流体力学、海洋工学
2009.09~2022.06.
従事しているプロジェクト研究
A practical approximation method for free-surface Green's function in finite water depth with an extreme fast computational speed
2019.04~2019.12, 代表者:劉 盈溢, Francis Noblesse, 九州大学応用力学研究所, Shanghai Jiao Tong University
This research aims to develop a practical efficient method for evaluation of finite-depth free-surface Green's function with a sufficient degree of accuracy..
波と風条件における細長トラス構造浮体式洋上風車の弾性変形に関する研究
2018.07~2020.06, 代表者:劉 盈溢, 九州大学応用力学研究所
This research aims to develop a systematic modeling method for a special type of semi-submersible floating wind turbine, composed by slender trussed bracings..
Performance evaluation of multiple-rotor floating wind turbine systems of semi-submersible type under the effect of partial wake from upstream rotors
2018.10~2019.03, 代表者:劉 盈溢, 九州大学応用力学研究所
A numerical model has been developed to analyze the dynamic behavior of a floating multiple wind turbine system in the presence of both waves and winds, using which the partial wake effect on the downstream turbine has been studied..
浮体式洋上風車の非線形不規則波における流力応答と構造応答特性
2018.04~2020.02, 代表者:劉 盈溢, 九州大学応用力学研究所
This project aims to foster young Japanese students in studying hydrodynamics, aerodynamics and hydroelasticity of a floating wind turbine in harsh sea conditions, with international cooperations..
Development of a next-generation IGA-BEM based on T-splines to investigate the performance of complex-shaped wave energy devices undergoing strong mutual interactions in large arrays
2018.04~2021.03, 代表者:劉 盈溢, 九州大学応用力学研究所
This research aims to establish a sophisticated isogeometric boundary element method (IGA-BEM) based on the latest novel T-spline technology. Multiple-scattering theory and modern computation algorithms & techniques will be employed to speed up the computation efficiency. The strong mutual interaction physics between complex-shaped wave energy devices in large arrays will be investigated thoroughly, accompanied by validations from the laboratory physical test..
研究業績
主要原著論文
1. Yingyi Liu, HAMS: A frequency-domain preprocessor for wave-structure interactions-Theory, development, and application, Journal of Marine Science and Engineering, 10.3390/jmse7030081, 7, 81, 1-19, 2019.03, [URL].
2. Yingyi Liu, Shigeo Yoshida, Hiroshi Yamamoto, Akinori Toyofuku, Guanghua He, Shunhan Yang, Response characteristics of the DeepCwind floating wind turbine moored by a Single-Point Mooring system, Applied Sciences (Switzerland), 10.3390/app8112306, 8, 11, 1-20, 2018.11, [URL].
3. Yingyi Liu, Shigeo Yoshida, Changhong Hu, Makoto Sueyoshi, Liang Sun, Junliang Gao, Peiwen Cong, Guanghua He, A reliable open-source package for performance evaluation of floating renewable energy systems in coastal and offshore regions, Energy Conversion and Management, 10.1016/j.enconman.2018.08.012, 174, 516-536, 2018.10, [URL], The booming developments of coastal/offshore renewable energies in recent years call for a powerful numerical code, ideally open-source packaged, to accelerate the researches in the spotlight. This paper presents such an efficient software package for evaluating the performance of floating renewable energy systems in the coastal and offshore regions. It aims to contribute an open-source effort in numerical simulations for ocean energy converters. Though computation of the free-surface effect in moderate depth region is extremely troublesome due to the singularities, the software package proposed in the present paper gives a satisfactory solution to keep the balance of accuracy and efficiency. In the present paper, the interface and structure of the package are introduced in detail so as to be well understood by the reader. Benchmark tests for various types of converters have confirmed the accuracy and efficiency of the package which can be incorporated easily with a frequency domain solver for efficient analysis. By contributing as one of the pioneer works in the open-source effort of evaluating the moderate-depth free-surface Green’s function, with its advantages of a reliable accuracy and a relatively low cost, the authors are hoping that the publication of the present software package will promote the continuous researches in developing robust and reliable coastal and offshore renewable energy systems..
4. Yingyi Liu, Shigeo Yoshida, An extension of the generalized actuator disc theory for aerodynamic analysis of the diffuser-augmented wind turbines, Energy, 10.1016/j.energy.2015.09.114, 93, 2, 1852-1859, 2015.12, [URL].
5. Yingyi Liu, Changhong Hu, Sueyoshi Makoto, Hidetsugu Iwashita, Masashi Kashiwagi, Motion response prediction by hybrid panel-stick models for a semi-submersible with bracings, Journal of Marine Science and Technology, 10.1007/s00773-016-0390-1, 21, 4, 742-757, 2016.12, [URL].
6. Yingyi Liu, Hidetsugu Iwashita, Changhong Hu, A calculation method for finite depth free-surface green function, International Journal of Naval Architecture and Ocean Engineering, 10.1515/ijnaoe-2015-0026, 7, 2, 375-389, 2015.03, [URL].
7. Yingyi Liu, Bin Teng, Peiwen Cong, Changfeng Liu, Ying Gou, Analytical study of wave diffraction and radiation by a submerged sphere in infinite water depth, Ocean Engineering, 10.1016/j.oceaneng.2012.05.004, 51, 129-141, 2012.07, [URL].
8. Yingyi Liu, Ying Gou, Bin Teng, Shigeo Yoshida, An Extremely Efficient Boundary Element Method for Wave Interaction with Long Cylindrical Structures Based on Free-Surface Green’s Function, Computation, 10.3390/computation4030036, 4, 3, 1-20, 2016.09, [URL].
主要学会発表等
1. Yingyi Liu, Shigeo Yoshida, Hiroshi Yamamoto, Akinori Toyofuku, Changhong Hu, Makoto Sueyoshi, Hongzhong Zhu, Release of a reliable open-source package for performance evaluation of ocean renewable energy devices, 4th Asian Wave and Tidal Energy Conference (AWTEC 2018), 2018.09, Marine renewable energy (MRE) devices, such as offshore wind turbines, wave energy converters and tidal energy converters, are usually in the form of floating types and anchored by mooring systems. To analyze the feasibility of these floating systems in an efficient manner with respect to a wide band of frequency, frequency domain methods are good options to choose. In the present work, we developed an efficient software package for evaluating the performance of floating renewable energy systems in the coastal and offshore regions. It aims to contribute an open-source effort to numerical simulations for ocean energy converters. The interface and structure of the software package are introduced in detail so as to let it be well understood by the readers. Computations of a benchmark geometry and two practical applications of floating wind turbine are conducted and compared with theoretical results, experimental data and results from commercial software Hydrostar, justifying the effectiveness of the developed software package..
2. Yingyi Liu, Changhong Hu, Sueyoshi Makoto, Shigeo Yoshida, Yuichiro Honda, Yuji Ohya, Time domain simulation of a semi-submersible type floating wind turbine, 24th International Ocean and Polar Engineering Conference, ISOPE 2014 Busan, 2014.06, [URL].
3. Yingyi Liu, Changhong Hu, Sueyoshi Makoto, Hidetsugu Iwashita, Hydrodynamic analysis of a semi-submersible FOWT by hybrid panel-stick models, 25th International Ocean and Polar Engineering Conference, ISOPE 2015, 2015.06, [URL].
4. Yingyi Liu, Yoshida Shigeo, Development of an open-source package for computing free-surface Green’s function in constant-depth ocean Topography: FinGreen3D, International Symposium on Ocean Science and Technology, 2017.11.
作品・ソフトウェア・データベース等
1. Yingyi Liu, FINGREEN3D, 2018.07, [URL], FINGREEN3D is an open-source package for computation of the free-surface Green's function under a finite water depth, which is the core-part of the boundary integral equations in the potential flow theory for analysis of wave-structure interactions. It is currently written in FORTRAN 90. FINGREEN3D is developed in the hope that it can contribute to the continuous development of offshore floating renewable energy systems as well as other ocean/marine engineering applications, regardless of academic or industrial purpose..
学会活動
所属学会名
日本船舶海洋工学会
International Network on Offshore Renewable Energy (INORE)
学会誌・雑誌・著書の編集への参加状況
2019.07~2020.06, Heliyon, 国際, Editorial Advisory Board Member.
2019.06~2019.12, Frontiers in Energy Research, 国際, Guest Associate Editor.
2019.02~2019.06, Heliyon, 国際, 編集委員.
学術論文等の審査
年度 外国語雑誌査読論文数 日本語雑誌査読論文数 国際会議録査読論文数 国内会議録査読論文数 合計
2019年度 13  13 
2018年度 27  28 
2017年度
2016年度
その他の研究活動
海外渡航状況, 海外での教育研究歴
Shanghai Jiao Tong University, China, 2019.04~2019.04.
University of Oxford, UnitedKingdom, 2019.03~2019.03.
Instituto Superior Técnico, Portugal, 2018.10~2018.10.
Taipei, Taiwan, 2018.09~2018.09.
Dalian University of Technology, China, 2018.09~2018.09.
Shanghai Jiao Tong University, China, 2018.06~2018.06.
Harbin Institute of Technology (Weihai), China, 2017.11~2017.12.
外国人研究者等の受入れ状況
2018.11~2018.11, 2週間未満, CNOOC Research Institute Co., Ltd, China, .
受賞
Best Paper Award, The 4th Asian Wave and Tidal Energy Conference (AWTEC 2018), 2018.09.
2018 Peer Review Awards (Top Reviewers for Engineering), Publons, 2018.09.
研究資金
科学研究費補助金の採択状況(文部科学省、日本学術振興会)
2018年度~2021年度, 若手研究, 代表, Development of a next-generation IGA-BEM based on T-splines to investigate the performance of complex-shaped wave energy devices undergoing strong mutual interactions in large arrays.
科学研究費補助金の採択状況(文部科学省、日本学術振興会以外)
2018年度~2020年度, 公益社団法人 日本船舶海洋工学会 海外共同研究促進事業 共同研究補助金, 代表, Hydrodynamic and structural response characteristics of offshore floating wind turbines in nonlinear irregular waves (浮体式洋上風車の非線形不規則波における流体力学的応答と構造応答特性).
競争的資金(受託研究を含む)の採択状況
2018年度~2020年度, Open Funding of the State Key Laboratory of Coastal and Offshore Engineering of Dalian University of Technology, 代表, 波と風条件における細長トラス構造浮体式洋上風車の弾性変形に関する研究
Elastic deformation of a floating wind turbine structure composed by slender members in the presence of waves and winds.
共同研究、受託研究(競争的資金を除く)の受入状況
2017.07~2018.03, 連携, 風力発電等技術研究開発/洋上風力発電等技術研究開発/次世代浮体式洋上風力発電システム実証研究(要素技術開発).
学内資金・基金等への採択状況
2018年度~2019年度, 平成30年度エネルギー研究教育機構 若手研究者・博士課程学生支援プログラム, 代表, Performance evaluation of multiple-rotor floating wind turbine systems of semi-submersible type under the effect of partial wake from upstream rotors.

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