孤立波作用下振荡水柱波能转换装置的越浪研究  

Investigating the overtopping of an oscillating water column wave energy converter under the action of solitary wave

作　　者：牟迪 王荣泉[1] 宁德志[1] 陈丽芬[1] MU Di;WANG Rongquan;NING Dezhi;CHEN Lifen(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《哈尔滨工程大学学报》2023年第9期1527-1533,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(52001054,52271260);辽宁省自然科学基金项目(2021-BS-060);中央高校基本科研业务费专项(DUT23RC(3)017).

摘　　要：为研究海啸等浅水大波与振荡水柱波浪能转换装置(OWC-WEC)作用时的越浪现象,本文利用开源软件OpenFOAM,并采用孤立波作为输入波形进行数值模拟研究。该模型求解守恒型N-S方程,其中孤立波采用waves2Foam造波模块进行数值造波,通过对比数值模拟结果与模型实验结果验证该数值模型的有效性。研究发现:用以往基于防波堤模型得到的经验公式不能准确预测浅水波与振荡水柱波浪能转换装置的越浪量、越浪厚度等物理量,数值模拟结果与经验公式趋势保持一致,但经验公式预测的结果明显偏大。越浪流在顶板上方主要以匀速传播,传播速度随相对波高增大而增大。发生越浪现象的同时,出现了顶板砰击现象,砰击压强随相对波高的增高而降低并且砰击点随之逐渐向后移动。本文以期为岸式或集成于防波堤的振荡水柱波浪能转换装置的设计提供参考。To explore the overtopping phenomenon of oscillating water column wave energy converters(OWCWECs)under the influence of tsunamis or other large waves in shallow water,a numerical simulation using the open-source software OpenFOAM was performed with solitary waves as the input waveform.Numerical models were used to solve the conservative Navier-Stokes equations.Solitary waves were generated by the waves2Foam toolbox in OpenFOAM.Comparisons of the simulation results with the experiment results validated the effectiveness of the proposed model.Furthermore,the overtopping discharge,thickness,and other physical parameters of the OWC-WEC cannot be predicted by the empirical formula derived based on the breakwater model.The numerical simulation results were consistent with the empirical formula trend,but the empirical results were obviously larger.The flow of the overtopping mainly propagates along the ceiling at a uniform velocity,and the velocity increases with increasing relative wave height.The ceiling slamming phenomenon is induced by overtopping,during which the pressure of slamming decreases with increasing wave height and the location of slamming moving backward step by step.This work serves as a reference for designing nearshore or breakwater-integrated OWC-WECs.

关 键 词：海啸 波浪能 振荡水柱 波浪能转换装置 OPENFOAM 孤立波 越浪量 越浪厚度 砰击 

分 类 号：U661.1[交通运输工程—船舶及航道工程]