水流对复合筒型基础波浪爬升影响机制的数值模拟研究  

Numerical Simulation of the Effect of Current on Wave Run-Up Around Composite Bucket Foundation

作　　者：于通顺[1] 宋昊阳 刘梅梅[2] 章誉天 Yu Tongshun;Song Haoyang;Liu Meimei;Zhang Yutian(College of Engineering,Ocean University of China,Qingdao 266100,China;CCCC Fourth Harbor Engineering Institute Co.,Ltd.,Guangzhou 510230,China;Dianjiang County Water Conservancy Bureau of Chongqing City,Chongqing 408300,China)

机构地区：[1]中国海洋大学工程学院,青岛266100 [2]中交四航工程研究院有限公司,广州510230 [3]重庆市垫江县水利局,重庆408300

出　　处：《天津大学学报（自然科学与工程技术版）》2022年第12期1309-1317,共9页Journal of Tianjin University：Science and Technology

基　　金：泰山学者工程专项经费资助项目(ts20190914);国家自然科学基金资助项目(52071304,51509230);山东省重点科研开发项目(2019GHY112044).

摘　　要：复合筒型基础(CBF)是一种新型的海上风电基础,当波浪海流与其大尺寸反弧段作用时,会产生复杂的波浪爬升现象,严重威胁基础外平台的安全,因此,有必要对波流作用下复合筒型基础的波浪爬升现象开展研究.首先,采用RNG k-ε模型建立了波流与复合筒型基础相互作用的数值水槽.其次,基于试验数据验证了数值模型的准确性.最后,探究了波流作用下复合筒型基础周围的波浪爬升规律,揭示了不同流速比U cw下水流对波浪爬升的贡献.研究发现:①波浪单独作用下复合筒型基础前方水体回落到最低点时,水质点的运动方向均为斜向下方,而在波流联合作用时,复合筒型基础前端形成漩涡,背面的水质点将朝着不同的方向进行扩散;②波浪单独作用时,复合筒型基础背浪面水体呈“公鸡尾”状,而波流联合作用时,复合筒型基础背浪面水体呈“双髻鲨”状;③当波陡参数为0.025时,流速比由0.46增大到0.59时,波浪爬升高度增大约0.55倍.Composite bucket foundation(CBF)is a new type of offshore wind turbine foundation.When wave and current interact with its large-scale arc transition structure,complex wave run-up occurs,which heavily affects the safety of the platforms.Thus,it is necessary to study the wave run-up effect on CBF.First,a numerical wave-current tank was established using the RNG k-εmodel.Secondly,the accuracy of the numerical model was verified based on the experimental data.Finally,the law of the wave run-up around the CBF under the action of wave and current was explored,and the contribution of current to wave run-up under different velocity ratios Ucw was revealed.The results show that:①Under the action of wave alone,when the water in front of the CBF falls back to the lowest point,the motion trajectory of the water particles is relatively regular,and the vector directions are inclined downward.However,under the combined action of wave and current,a vortex is formed at the front end of the CBF,and the water particles on the back will diffuse in different directions.②When the wave acts alone,the water on the back of the CBF is a“cock tail”shape,while when the wave and current act together,the water on the back of the CBF is a“hammerhead shark”shape.③When the wave steepness parameter is 0.025 and the velocity ratio increases from 0.46 to 0.59,the wave run-up height increases about 0.55 times.

关 键 词：复合筒型基础 波浪爬升 波流相互作用 数值模拟 

分 类 号：TV92[水利工程—水利水电工程]