| 考虑流固耦合的Spar型浮式风力机涡激运动特性研究 |
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| 引用本文： | 李磊,张兆德,张吉萍,曾勇军.考虑流固耦合的Spar型浮式风力机涡激运动特性研究[J].太阳能学报,2020,41(1):236-241. |
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| 作者姓名： | 李磊 张兆德 张吉萍 曾勇军 |
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| 作者单位： | 浙江海洋大学船舶与机电工程学院;捷胜海洋装备股份有限公司 |
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| 基金项目： | 浙江省自然科学基金(LY19E090002,LY19E090003);国家自然科学基金(51409232);浙江海洋大学人才引进科研基金(高雷诺数下张力腿平台涡激运动响应实验与数值研究)。 |
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| 摘 要： | 对弹性支撑单圆柱在均匀流作用下的涡激运动特性进行数值模拟,捕捉到"锁定区"、"拍"、"频率变换"等现象。柱体周围流场采用Fluent求解,将4阶Runge-Kutta方法代码写入用户自定义函数(UDF)求解运动微分方程,运用动网格技术更新流场,实现圆柱与流场的非线性耦合作用。发现随着折合速度的增大,涡激运动响应可分为锁定前支、锁定区、锁定后支3个阶段,在进入锁定区前(折合速度Ur=3)横向运动响应发生拍现象,当跨过锁定区后(折合速度Ur=10)发生频率变换现象。结果表明,横向涡激运动有较大范围的频率锁定现象,频率解锁前后圆柱涡激运动轨迹由"右8字"形变换为"左8字"形。
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| 关 键 词： | 海上浮式风力机 流固耦合(FSI) 圆柱 涡激运动 |
STUDY ON VORTEX INDUCED MOTION CHARACTERISTICS OF SPAR-TYPE FLOATING OFFSHORE WIND TURBINE CONSIDERING FLUID-STRUCTURE INTERACTION |
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| Li Lei,Zhang Zhaode,Zhang Jiping,Zeng Yongjun.STUDY ON VORTEX INDUCED MOTION CHARACTERISTICS OF SPAR-TYPE FLOATING OFFSHORE WIND TURBINE CONSIDERING FLUID-STRUCTURE INTERACTION[J].Acta Energiae Solaris Sinica,2020,41(1):236-241. |
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| Authors: | Li Lei Zhang Zhaode Zhang Jiping Zeng Yongjun |
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| Affiliation: | (School of Naval Architecture and Mechanical-Electrical Engineering,Zhejiang Ocean University,Zhoushan 316022,China;Jessn Marine Equipment Co.,Ltd.,Ningbo 315800,China) |
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| Abstract: | The foundation of Floating Offshore Wind Turbine(FOWT)most consist of a single cylinder or multi-cylinder,which is susceptible to Vortex Induced Motion(VIM)under the uniform current. In order to study VIM response of a flexible cylinder,numerical simulation was carried out under the uniform flow. The lock-in,beat and frequency switch phenomena were caught by considering horizontal in the designed mooring program. The flow field around cylinder was calculated by fluent software,and the differential motion equation was solved by forth order Runge-Kutta method which was manually written into the User Defined Functions(UDF),then dynamic mesh technology was adopted to update flow field. It is found that the response of VIM presents three stages with the reduced velocity increasing,starting branch,lock-in region and unlocking branch. Beat phenomenon occurred in the transverse response under Ur=3,while the frequency switch phenomenon appeared under Ur=10 in unlocking branch. The results showed that transverse response has a wide range of lock-in region phenomenon,the trajectory of cylinder conversion from"right 8-shaped"to"left 8-shaped"before and after the frequency unlock. |
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| Keywords: | offshore wind turbine fluid structure interaction cylinder vortex induced motion |
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