基于FVCOM的普陀山潮流能试验区数值模拟  

Numerical Simulation of Tidal Energy Experiment Area in Mountain Putuo Based on FVCOM

作　　者：卢涣中 王项南[1] 白志刚[2] LU Huanzhong;WANG Xiangnan;BAI Zhigang(National Ocean Technology Center,Tianjin 300112,China;State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China)

机构地区：[1]国家海洋技术中心,天津300112 [2]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《海洋技术学报》2024年第5期113-122,共10页Journal of Ocean Technology

摘　　要：国内外关于潮流能试验场小范围海域流场特性研究中,缺乏高精度的数学模型模拟真实环境下的水动力特性。本文基于非结构化网格的有限体积海洋数值模型(Finite-Volume Coastal Ocean Model,FVCOM),建立舟山及普陀山-葫芦岛潮流能试验场水域潮汐潮流数值模型,采用大范围区域潮位验证率定模型后得到更精确的小范围开边界条件嵌套小范围区域进行潮流计算。通过4个测站大、小潮的拟合数据和实测潮位、潮流流速、潮流流向数据进行对比,调整装置附近局部区域底摩阻取值,从而概化装置的影响,同时对小范围的潮波传播规律及流场水动力特性进行分析。结果表明:潮流能试验区所处海域潮汐类型为不规则半日潮,潮流以往复流为主;潮流运动传播主要方向为SSE—NNW向,该海域潮流特性空间差异明显;左岸龙南礁内湾区涨潮时呈逆时针传播,落潮时漩涡反向,右侧大龙山咀湾区涨落潮时均无明显涡旋。本研究可以为试验场海域潮流能发电装置阵列布放优化提供理论参考。In the research on the characteristics of small-scale sea currents in tidal energy test sites at home and abroad,there is a lack of high-precision mathematical models to simulate the hydrodynamic characteristics under real environmental conditions.This paper establishes a numerical model of tidal currents in the waters of the Zhoushan and Putuoshan-Huludao tidal energy test sites based on the unstructured grid Finite-Volume Coastal Ocean Model(FVCOM).After validating the model with wide-area tidal data,more accurate open boundary conditions for small-scale areas are obtained and nested within the larger domain for tidal flow calculations.By comparing and adjusting the local bed friction values near the device based on the fitting data of tidal variation from four gauge stations,as well as measured tidal levels,flow velocities,and directions,the influence of the device is generalized.Simultaneously,the propagation law of tidal waves and the hydrodynamic characteristics of the flow field in the small-scale area are analyzed.The results indicate that the tidal type in the test area is irregular semidiurnal,with bidirectional tidal currents dominating.The main direction of tidal current propagation is SSE要NNW,and there is significant spatial variation in tidal current characteristics in the area.During flood tide in the Longnan Reef Bay on the left bank,counterclockwise propagation is observed,while vortexes reverse during ebb tide;no significant eddies are observed during tide rise and fall in the Dalongshan Peninsula Bay on the right bank.These findings can provide theoretical references for optimizing the layout of tidal energy generation devices in the test site area.

关 键 词：FVCOM 普陀山潮流能试验区 流场分析 水动力特性 数值模拟 

分 类 号：P743.3[天文地球—海洋科学]