Analysis of Fluid-Structure Coupling Characteristics of Semi-submersible Offshore Wind Turbines

doi:10.12096/j.2096-4528.pgt.22026

Abstract

Abstract:

Based on the wind turbine data provided by the American National Renewable Energy Laboratory (NREL), the manuscript was used ProE to establish a 5 MW offshore semi-submersible wind turbine model. A two-way fluid-structure coupling simulation through simulation software was conducted. The research was based on the deformation and equivalent stress of the two-way fluid-structure coupling semi-submersible wind turbine blade during the coupling action. The shutdown state of the wind turbine and the operation of the wind turbine under different wind and wave conditions were analyzed. The analysis shows that the blade is the most important part of the wind turbine. As the speed of impeller increases, the deformation increases, and the peak value shifts to the left. The maximum equivalent stress of the wind wheel appears in the initial stage of operation. As time goes by, the stress finally stabilizes within a certain range. The degree of deformation of the blade increases with the increase of wind speed. During the operation of the wind turbine, the mooring line moves periodically with the float foundation. This research provides a reference for the safe and stable operation of offshore semi-submersible wind turbines, and at the same time provides a reference for the design of offshore semi-submersible wind turbines.

Key words: offshore wind power, semi-submersible floating wind turbine, fluid-structure coupling, deformation, equivalent stress

CLC Number:

TK 83

Danmei HU, Li ZENG, Yunhao CHEN. Analysis of Fluid-Structure Coupling Characteristics of Semi-submersible Offshore Wind Turbines[J]. Power Generation Technology, 2022, 43(2): 218-226.

Figures/Tables 16

Tab. 1 Wind turbine structure parameters

参数	数值
风轮直径/m 叶片长度/m 轮毂直径/m	126 61.5 5
额定风速/(m_·s^-1)	11.4
切入风速/(m_·s^-1)	3
切出风速/(m_·s^-1)	25
额定转速/(rad_·s^-1)	12.1
额定功率/MW	5
塔筒高度/m	90
半潜式浮式平台整体外廓/(m×m)	50×50
平台中心圆筒过渡段/m	D：1.6， H：22.8
浮筒外廓/m 浮筒斜撑尺寸/m 浮筒上下圆筒横梁尺寸/m 系泊缆尺寸/m	D：12， H：36 D：1.6， H：33.8 D：1.6， H：40 D：0.16， H：50

Fig. 1 Semi-submersible floating wind turbine structure model

Fig. 2 Overall model of computational domain

Fig. 3 Fluid-structure coupling flow chart

Fig. 4 Wind turbine structural domain grid

Fig. 5 Fluid domain grid

Fig. 6 Computational domain model

Fig. 7 Computational domain model

Tab. 2 Wind turbine speed at different wind speeds

风速/(m_·s^-1)	转速/(rad_·min^-1)	角速度/(rad_·s^-1)
4	7.18	0.752
5	7.38	0.773
6	7.94	0.831
7	8.46	0.886
8	9.16	0.959
9	10.33	1.082
10	11.43	1.197
11.4	12.10	1.267

Fig. 8 Comparison of maximum blade deformation at different speeds

Fig. 9 Maximum equivalent stress of the wind wheel changes with time

Fig. 10 Displacement cloud diagram of wind turbine foundation

Fig. 11 Float foundation and mooring line displacement curve diagram with time

Fig. 12 Velocity vector diagram around wind turbine wheel

Fig. 13 Velocity vector diagram of fluid domain

Fig. 14 Wind turbine streamline diagram

References 21

1	董文博，顾秀芳，陈艳宁．风电并网价值分析[J]．发电技术，2020，41(3)：320-327． doi:10.12096/j.2096-4528.pgt.19117
	DONG W B， GU X F， CHEN Y N ．Value analysis of wind power integration[J]．Power Generation Technology，2020，41(3)：320-327． doi:10.12096/j.2096-4528.pgt.19117
2	姜楠．深海风力发电技术的发展现状与前景分析[J]．新能源进展，2015，3(1)：21-24． doi:10.3969/j.issn.2095-560X.2015.01.004
	JIANG N ．Development status and prospect analysis of deep-sea wind power technology[J]．Advances in New and Renewable Energy，2015，3(1)：21-24． doi:10.3969/j.issn.2095-560X.2015.01.004
3	杨大业，项祖涛，罗煦之，等．永磁型风机海上风电送出系统甩负荷故障暂时过电压影响因素分析[J]．发电技术，2022，43(1)：111-118． doi:10.12096/j.2096-4528.pgt.20033
	YANG D Y， XIANG Z T， LUO X Z，et al ．Analysis on influence factors of temporary overvoltage of load rejection fault of offshore wind power transmission system of permanent magnet synchronous generator[J]．Power Generation Technology，2022，43(1)：111-118． doi:10.12096/j.2096-4528.pgt.20033
4	余浩，肖彭瑶，林勇，等．大规模海上风电高电压穿越研究进展与展望[J]．智慧电力，2020，48(3)：30-38． doi:10.3969/j.issn.1673-7598.2020.03.005
	YU H， XIAO P Y， LIN Y，et al ．Review on high voltage ride-through strategies for offshore doubly-fed wind farms[J]．Smart Power，2020，48(3)：30-38． doi:10.3969/j.issn.1673-7598.2020.03.005
5	付艳，周晓风，戴国安，等．海上风电直流耗能装置和保护配合策略研究[J]．电力系统保护与控制，2021，49(15)：178-186．
	FU Y， ZHOU X F， DAI G A，et al ．Research on coordination strategy for an offshore wind power DC chopper device and protection[J]．Power System Protection and Control，2021，49(15)：178-186．
6	王旭东，曹燕燕．海上风力发电技术现状及发展趋势[J]．科技创新导报，2008(5)：92． doi:10.3969/j.issn.1674-098X.2008.05.088
	WANG X D， CAO Y Y ．Status and development trend of offshore wind power technology[J]．Science and Technology Innovation Herald， 2008(5)：92． doi:10.3969/j.issn.1674-098X.2008.05.088
7	李静，孙亚胜．海上风力发电机组的基础形式[J]．上海电力，2008，21(3)：314-317．
	LI J， SUN Y S ．Basic form of offshore wind turbine[J]．Shanghai Electric Power，2008，21(3)： 314-317．
8	王涵．小水深半潜型风电浮式基础的耦合动力分析与试验研究[D]．天津：天津大学，2014．
	WANG H ．Coupled dynamic analysis and experimental research of semi-submersible floating foundation for wind power in the shallow water[D]．Tianjin：Tianjin University，2014．
9	MASCIOLA M， ROBERTSON A， JONKMAN J，et al ．Assessment of the importance of mooring dynamics on the global response of the deepcwind floating semisubmersible offshore wind turbine[J]．Bollettino Della Società Italiana Di Biologia Sperimentale，2013，46(11)：553-555．
10	CHENG P， HUANG Y， WAN D C ．A numerical model for fully coupled aero-hydrodynamic analysis of floating offshore wind turbine[J]．Ocean Engineering， 2019，173(1)：183-196． doi:10.1016/j.oceaneng.2018.12.021
11	刘海锋，孙凯，胡丹梅．大型风力机尾迹双向流固耦合特性分析[J]．可再生能源，2015，33(11)：1664-1673．
	LIU H F， SUN K， HU D M ．Analysis of bidirectional fluid-solid coupling characteristics of large wind turbine wake[J]．Renewable Energy Resources，2015，33(11)：1664-1673．
12	邓新丽，孙文磊．大型风力机叶片在三维湍流下的载荷分析与计算[J]．机床与液压，2013，41(1)：28-30． doi:10.3969/j.issn.1001-3881.2013.01.008
	DENG X L， SUN W L ．Load analysis and calculation of large wind turbine blades under three-dimensional turbulence[J]．Machine Tool and Hydraulics，2013，41(1)：28-30． doi:10.3969/j.issn.1001-3881.2013.01.008
13	CHEN J H， HU Z Q， WAN D C，et al ．Comparisons of the dynamical characteristics of a semi-submersible floating offshore wind turbine based on two different blade concepts[J]．Ocean Engineering，2018，15：305-318． doi:10.1016/j.oceaneng.2018.01.104
14	吴云峰．双向流固耦合两种计算方法的比较[D]．天津：天津大学，2009． doi:10.1007/s12209-009-0036-z
	WU Y F ．Comparison of two calculation methods of fluid-solid interaction[D]．Tianjin ：Tianjin University，2009． doi:10.1007/s12209-009-0036-z
15	周迪．叶轮机械非定常流动及气动弹性计算[D]．南京：南京航空航天大学，2019．
	ZHOU D ．Numerical investigations of unsteady aerodynamics and aeroelasticity of turbomachines[D]．Nanjing ：Nanjing University of Aeronautics and Astronautics，2019．
16	陶文铨．数值传热学[M]．西安：西安交通大学出版社，2011：372-375．
	TAO W Q ．Numerical heat transfer[M]．Xi’an ： Xi’an University Press，2011： 372-375．
17	任年鑫，欧进萍．大型海上风力机尾迹区域风场分析[J]．计算力学学报，2012，29(3)：327-332． doi:10.7511/jslx20123006
	REN N X， OU J P ．Numerical analysis for the wake zone of large offshore wind turbine[J]．Chinese Journal of Computational Mechanics，2012，29(3)：327-332． doi:10.7511/jslx20123006
18	CHOUDHURY D ．Introduction to the renormalization group method and turbulence modeling[R]．New York：Fluent Incorporated Technical Memorandum TM-107，1993．
19	王丽丽，田德，王海宽，等．风力发电机组风轮的叶片材料[J]．农村牧区机械化，2009(2)： 39-42． doi:10.3969/j.issn.1007-3191.2009.02.020
	WANG L L， TIAN D， WANG H K，et al ．Blade material of wind wheel of wind turbine[J]．Mechanization of Rural Pastoral Areas，2009(2)：39-42． doi:10.3969/j.issn.1007-3191.2009.02.020
20	张建平，李冬亮，韩熠．大型风力机叶片在不同平均风速作用下的挠度及应力分析[J]．可再生能源，2012，30(7)：37-40．
	ZHANG J P， LI D L， HAN Y ．Deflection and stress analysis of large wind turbine blades under different average wind speeds[J]．Renewable Energy，2012，30(7)：38-40．
21	JONKMAN J M， BUTTERFIELD S， MUSIAL W，et al ．Definition of a 5 MW reference wind turbine for offshore system development[R]．Golden，Colorado，USA：National Renewable Energy Laboratory，2009．

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