Modeling the hydrodynamics of the OWC device placed over an undulated seabed in the presence of ocean current

IF 6.2 2区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY alexandria engineering journal Pub Date : 2024-10-24 DOI:10.1016/j.aej.2024.10.027
Santanu Kumar Dash , Kshma Trivedi , Santanu Koley , Shrabani Mondal
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Abstract

The current investigation emphasizes the mathematical modeling of the hydrodynamics associated with the oscillating water column wave energy converter (OWC-WEC) device situated above undulating bottom of the ocean in the presence of ocean currents. The mathematical problem is investigated within the framework of the two-dimensional Cartesian coordinate system by incorporating the classical linear wave-structure theory. The boundary element method is used to address the corresponding boundary value problem. A significant attention is devoted to the analysis of the effectiveness and horizontal wave force exerted on the frontal barrier of the oscillating water column device by considering various values of incident wave and current parameters, as well as structural parameters related to both the oscillating water column device and the undulated seabed. Moreover, the study in the time domain is carried out in order to illustrate the variations in free surface elevations at different time instances by considering the influence of both following and opposing currents. The results demonstrate that the “Doppler Shift” effect of the frequency due to the presence of ocean currents significantly influences the resonating patterns of the efficiency and force curves. As the current velocities increase, the resonating frequencies occur for higher values of incident wavenumbers.
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在洋流作用下,对放置在起伏海床上的 OWC 设备的流体力学进行建模
目前的研究重点是在洋流存在的情况下,对位于起伏海底上方的振荡水柱波浪能转换器(OWC-WEC)装置的相关流体力学进行数学建模。数学问题在二维笛卡尔坐标系框架内,结合经典线性波浪-结构理论进行研究。采用边界元法解决相应的边界值问题。通过考虑不同的入射波和水流参数值,以及与振荡水柱装置和起伏海底相关的结构参数,对施加在振荡水柱装置正面屏障上的效力和水平波力进行了分析。此外,考虑到顺流和逆流的影响,还进行了时域研究,以说明自由表面高程在不同时间的变化情况。结果表明,由于洋流的存在,频率的 "多普勒频移 "效应对效率和力曲线的共振模式产生了重大影响。随着洋流速度的增加,共振频率出现在更高的入射波数值上。
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来源期刊
alexandria engineering journal
alexandria engineering journal Engineering-General Engineering
CiteScore
11.20
自引率
4.40%
发文量
1015
审稿时长
43 days
期刊介绍: Alexandria Engineering Journal is an international journal devoted to publishing high quality papers in the field of engineering and applied science. Alexandria Engineering Journal is cited in the Engineering Information Services (EIS) and the Chemical Abstracts (CA). The papers published in Alexandria Engineering Journal are grouped into five sections, according to the following classification: • Mechanical, Production, Marine and Textile Engineering • Electrical Engineering, Computer Science and Nuclear Engineering • Civil and Architecture Engineering • Chemical Engineering and Applied Sciences • Environmental Engineering
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