海流海浪耦合作用对台风浪影响的数值研究  

Numerical Study on the Influence of Ocean Current Wave Coupling on Typhoon Waves

作　　者：李近元[1,2] 王宇 曹淑刚[2] 刘金全 李红有 方念乔 LI Jinyuan;WANG Yu;CAO Shugang;LIU Jinquan;LI Hongyou;FANG Nianqiao(School of Ocean Sciences,China University of Geosciences(Beijing),Beijing 100083,China;Longyuan(Beijing)Wind Power Engineering Design Consulting Co.,Ltd.,Beijing 100034,China;North China Sea Offshore Engineering Survey Institute of SOA,Qingdao 266061,China)

机构地区：[1]中国地质大学(北京)海洋学院,北京100083 [2]龙源(北京)风电工程设计咨询有限公司,北京100034 [3]国家海洋局北海海洋工程勘察研究院,山东青岛266061

出　　处：《海洋科学进展》2023年第3期456-465,共10页Advances in Marine Science

基　　金：国家自然科学基金项目(42276028);国家能源投资集团有限公司2020年度十大重点科技攻关项目(GJNY-20-17)。

摘　　要：漂浮式海上风电工程设计对波浪参数等必要环境参数提出了更高的要求。本文针对福建南日漂浮式海上风电场海域建立了高分辨率的海浪-海流耦合数值模型,研究海上风电场区水位和海流对海浪的影响。模拟结果显示,耦合模式所得有效波高更加准确,可以体现水位和流速变化对波高的影响。通过分析台风过程中的浪流耦合作用对海浪模拟结果的影响发现,浪流耦合作用对最大有效波高的影响空间分布差异明显,1307号、1319号、0908号和1617号四次台风过程中,耦合作用对工程区域最大有效波高的影响可达−1.0~1.0 m。对单点的模拟结果分析发现,流向和浪向同向时对浪高有削弱作用,反向时对浪高有增强作用。此外,浪流耦合作用对波向和谱峰周期也有明显的影响,在1319号台风过程中,波向变化可达20°,谱峰周期变化可达2 s。本文论证了采用海浪-海流耦合模式在重现海浪极值中的重要性,对海上工程设计具有参考价值。Environmental parameters(e.g.,wave design parameters)are necessary for the offshore engineering design.This study established a high-resolution wave-current coupled model for the sea area of offshore wind farm of Fujian Nanri Island,and further discussed the effects of water level and current on waves.The simulation results showed that compared with the single wave model,the significant wave heights obtained by the coupled model are more accurate.By analyzing the impact of wave current coupling on wave simulation results in the process of typhoons,we found that the spatial distribution of the impact of wave-current coupling on the maximum significant wave heights is significantly different.In the four typhoon processes of this study,the impact of coupling on the maximum significant wave heights in the project area can reach−1.0 to 1.0 m.The analysis of single point simulation results showed that the wave heights are weakened when the flow direction is in the same direction as the wave one,and are enhanced when the wave direction is in the opposite one.In addition,the wave current coupling also plays a significant effect on the wave direction and spectral peak period,which cause a wave direction variation of up to 20 degrees and a spectral peak period variation of up to 2 seconds,during typhoon 1319.Finally,this study clarified the importance of using wave current coupling model in reproducing wave extreme value,which can be used as a reference for offshore engineering design.

关 键 词：浪流耦合作用 台风浪 数值模拟 漂浮式海上风电场 

分 类 号：P731.33[天文地球—海洋科学]