Impact of varying turbulent flow conditions on the tidal turbine blade load fatigue

IF 9 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy Pub Date : 2025-05-16 DOI:10.1016/j.renene.2025.123370

Philippe Druault , Benoît Gaurier , Grégory Germain

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引用次数: 0

Abstract

The blade structural fatigue life estimation plays an important role in the manufacturing and operating of wind and tidal turbines. Then identifying the main sources of blade fatigue is of great importance for turbine life predictability. To this end, this paper presents a set of blade-thrust force and blade-root bending moment responses for a scale-model tidal turbine subjected to various unsteady turbulent flow conditions. The influence of the turbulence intensity, the integral length scale and the gaussianity on the blade structural fatigue is then individually investigated. Overall, it is shown that each of these flow characteristics which are intrinsically related, may have a significant impact on blade load fatigue. We then introduce the turbulence parameter taking into account both the integral length scale and the turbulence intensity to better reveal the blade structural fatigue. The non-Gaussian statistics also plays a significant role on blade load. Finally, present results emphasize that it is essential to account for the whole set of the main useful incoming turbulent flow characteristics and also their spatial variations over the rotor sweeping area to conclude on their effects on the turbine structural fatigue.

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不同湍流条件对潮汐水轮机叶片负荷疲劳的影响

叶片结构疲劳寿命的估算在风力和潮汐发电机组的制造和运行中起着重要的作用。因此，确定叶片疲劳的主要来源对涡轮寿命的预测具有重要意义。为此，本文给出了一组比例模型潮汐水轮机在各种非定常湍流条件下的叶片-推力和叶片-根部弯矩响应。分别研究了湍流强度、积分长度尺度和高斯度对叶片结构疲劳的影响。总的来说，研究表明，这些内在相关的流动特性中的每一个都可能对叶片负载疲劳产生重大影响。为了更好地反映叶片结构疲劳，我们引入了考虑积分长度尺度和湍流强度的湍流参数。非高斯统计量对叶片载荷也有重要影响。最后，目前的结果强调，必须考虑所有主要有用的来流特性及其在转子扫面积上的空间变化，才能得出它们对涡轮结构疲劳的影响。

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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来源期刊

Renewable Energy 工程技术-能源与燃料

CiteScore

18.40

自引率

9.20%

发文量

1955

审稿时长

6.6 months

期刊介绍： Renewable Energy journal is dedicated to advancing knowledge and disseminating insights on various topics and technologies within renewable energy systems and components. Our mission is to support researchers, engineers, economists, manufacturers, NGOs, associations, and societies in staying updated on new developments in their respective fields and applying alternative energy solutions to current practices. As an international, multidisciplinary journal in renewable energy engineering and research, we strive to be a premier peer-reviewed platform and a trusted source of original research and reviews in the field of renewable energy. Join us in our endeavor to drive innovation and progress in sustainable energy solutions.