Numerical Analysis of Leading-Edge Roughness Effects on the Aerodynamic Performance of a Thick Wind Turbine Airfoil

IF 2.7 3区地球科学 Q1 ENGINEERING, MARINE

Journal of Marine Science and Engineering Pub Date : 2024-09-08 DOI:10.3390/jmse12091588

Wei Zhang, Kuichao Ma, Chang Cai, Xiangyu Sun, Jun Zhang, Xiaohui Zhong, Xiaomin Rong, Qing’an Li

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引用次数: 0

Abstract

The aerodynamic performance of wind turbine airfoils is crucial for the efficiency and reliability of wind energy systems, with leading-edge roughness significantly impacting blade performance. This study conducts numerical simulations on the DU 00-W-401 airfoil to investigate the effects of leading-edge roughness. Results reveal that the rough airfoil exhibits a distinctive “N”-shaped lift coefficient curve. The formation mechanism of this nonlinear lift curve is primarily attributed to the development of the trailing-edge separation vortex and variations in the adverse pressure gradient from the maximum thickness position to the trailing-edge confluence. The impact of different roughness heights is further investigated. It is discovered that when the roughness height is higher than 0.3 mm, the boundary layer can be considered fully turbulent, and the lift curve shows the “N” shape stably. When the roughness height is between 0.07 mm and 0.1 mm, a transitional state can be observed, with several saltation points in the lift curve. The main characteristics of different flow regimes based on different lift curve segments are summarized. This research enhances the understanding of the effects of leading-edge roughness on the aerodynamic performance of a thick wind turbine airfoil, and the simulation method for considering the effect of leading-edge roughness is practical to be applied on large-scale wind turbine blade to estimate the aerodynamic performance under rough leading-edge conditions, thereby supporting advancements in wind turbine technology and promoting the broader adoption of renewable energy.

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前缘粗糙度对厚风力涡轮机翼面空气动力性能影响的数值分析

风力涡轮机机翼的空气动力性能对风能系统的效率和可靠性至关重要，而前缘粗糙度对叶片性能有显著影响。本研究对 DU 00-W-401 机翼进行了数值模拟，以研究前缘粗糙度的影响。结果显示，粗糙机翼呈现出独特的 "N "形升力系数曲线。这种非线性升力曲线的形成机制主要归因于后缘分离涡的发展以及从最大厚度位置到后缘汇合处的不利压力梯度的变化。我们进一步研究了不同粗糙度高度的影响。结果发现，当粗糙度高度大于 0.3 毫米时，边界层可视为完全湍流，升力曲线稳定地呈现 "N "形。当粗糙度高度在 0.07 毫米到 0.1 毫米之间时，可以观察到一种过渡状态，升力曲线上会出现几个盐化点。根据不同的扬程曲线段，总结了不同流态的主要特征。该研究加深了对前缘粗糙度对厚风电叶片气动性能影响的理解，考虑前缘粗糙度影响的仿真方法具有实用性，可应用于大型风电叶片，估算粗糙前缘条件下的气动性能，从而支持风电技术的进步，促进可再生能源的广泛应用。

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

Journal of Marine Science and Engineering Engineering-Ocean Engineering

CiteScore

4.40

自引率

20.70%

发文量

1640

审稿时长

18.09 days

期刊介绍： Journal of Marine Science and Engineering (JMSE; ISSN 2077-1312) is an international, peer-reviewed open access journal which provides an advanced forum for studies related to marine science and engineering. It publishes reviews, research papers and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation or experimental procedure, if unable to be published in a normal way, can be deposited as supplementary electronic material.