Development of a Computational Model for the Simulation of an Oscillating Water Column Wave Energy Converter Considering a Savonius Turbine

Q4 Physics and Astronomy Defect and Diffusion Forum Pub Date : 2023-07-14 DOI:10.4028/p-C8qvgv

A. Santos, A. P. Petry, L. Isoldi, G. Dias, J. A. Souza, E. D. dos Santos

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Abstract

This work presents the development of a computational model for the simulation of an Oscillating Water Column device that converts wave flow into electrical energy. The device is placed into a wave channel and a Savonius turbine is inserted in the inlet/outlet duct of the converter. The modeling of the turbine is performed with a rotational moving mesh that simulates the turbine movement in stabilized operating conditions. This coupling provides the minimization of simplifying assumptions, addressing in a single problem the two phenomena inherent to the device approach: the two-phase, incompressible and turbulent flow of air and water in a wave channel containing the oscillating water column device and the incompressible and turbulent airflow passing through a rotational turbine. The computational model was verified/validated for a free stream turbulent flow over a Savonius turbine and verified for the case of wave flow over a converter without the inserted turbine. Results showed that the coupled model allowed obtaining not only available power but also mechanical power in the turbine. For the rotation imposed in the domain, the turbine did not affect the behavior of the wave flow that impinges on the chamber of the OWC device. An augmentation of the power coefficient of the turbine in comparison with turbines subjected to free stream flows was obtained, showing that the fairing of turbine can led to increased power takeoff.

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考虑萨沃纽斯水轮机的振荡水柱波能转换器计算模型的建立

这项工作提出了一个计算模型的发展，模拟振荡水柱装置，将波浪流转化为电能。该装置被放置在一个波通道中，在转换器的进/出风道中插入一个Savonius涡轮机。采用旋转运动网格对汽轮机进行建模，模拟汽轮机在稳定工况下的运动。这种耦合提供了简化假设的最小化，在一个问题中解决了设备方法固有的两个现象:包含振荡水柱装置的波浪通道中空气和水的两相，不可压缩和湍流流动以及通过旋转涡轮机的不可压缩和湍流气流。计算模型在Savonius涡轮上的自由湍流流场和在没有插入涡轮的转化器上的波浪流场进行了验证。结果表明，该耦合模型不仅可以获得涡轮的可用功率，还可以获得涡轮的机械功率。对于施加在区域内的旋转，涡轮不影响冲击OWC装置腔室的波流行为。与自由流动的涡轮相比，得到了涡轮功率系数的增大，表明涡轮的整流罩可以增加功率起飞。

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来源期刊

Defect and Diffusion Forum Physics and Astronomy-Radiation

CiteScore

1.20

自引率

0.00%

发文量

127

期刊介绍： Defect and Diffusion Forum (formerly Part A of ''''Diffusion and Defect Data'''') is designed for publication of up-to-date scientific research and applied aspects in the area of formation and dissemination of defects in solid materials, including the phenomena of diffusion. In addition to the traditional topic of mass diffusion, the journal is open to papers from the area of heat transfer in solids, liquids and gases, materials and substances. All papers are peer-reviewed and edited. Members of Editorial Boards and Associate Editors are invited to submit papers for publication in “Defect and Diffusion Forum” . Authors retain the right to publish an extended and significantly updated version in another periodical.