Experimental and CFD analysis of the wake characteristics of tidal turbines

International Journal of Marine Energy Pub Date : 2016-12-01 DOI:10.1016/j.ijome.2016.07.001

Mulualem G. Gebreslassie , Stephanie O. Sanchez , Gavin R. Tabor , Michael R. Belmont , Tom Bruce , Grégory S. Payne , Ian Moon

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引用次数: 19

Abstract

This paper investigates the accuracy of the Computational Fluid Dynamics (CFD) based Immersed Body Force (IBF) turbine modelling method for predicting the flow characteristics of a Momentum-Reversal-Lift type of tidal turbine. This empirically-based CFD model has been developed based on the actuator disc method enhanced with additional features to mimic the effect of the complex blade motion on the downstream wake, without the high computational costs of explicitly modelling the dynamic blade motion. The model has been calibrated against the flow characteristics data obtained from experiment and found to perform well, although there are few inconsistencies in the flow patterns which show some of the limitations of the IBF model compared to a full dynamic blade motion simulation. However, given the complexity and computational cost of modelling the detailed blade motion the limitations of the IBF model are acceptable and will be useful especially for optimisation of arrays of devices where there is a significant computational demand.

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潮汐涡轮机尾流特性的实验与CFD分析

本文研究了基于计算流体力学(CFD)的沉体力(IBF)水轮机建模方法对动量-逆升力型潮汐水轮机流动特性预测的准确性。这个基于经验的CFD模型是在执行器盘方法的基础上开发的，该方法增强了附加功能，以模拟复杂的叶片运动对下游尾迹的影响，而没有明确建模动态叶片运动的高计算成本。该模型已根据从实验中获得的流动特性数据进行了校准，并发现其表现良好，尽管与全动态叶片运动模拟相比，IBF模型在流动模式上存在一些不一致，这表明了一些局限性。然而，考虑到叶片运动建模的复杂性和计算成本，IBF模型的局限性是可以接受的，特别是对于有大量计算需求的设备阵列的优化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International Journal of Marine Energy

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