Development and Measurement of a Very Thick Aerodynamic Profile for Wind Turbine Blades

Wind Pub Date : 2024-07-12 DOI:10.3390/wind4030010

A. Schaffarczyk, B. Lobo, Nicholas Balaresque, Volker Kremer, Janick Suhr, Zhongxia Wang

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Abstract

We designed 60% thick airfoil to improve the aerodynamic performance in the root region of wind turbine rotor blades, taking into account current constraints. After an extensive literature review and patent research, a design methodology (including the considerations of simple manufacturing) was set up, and extensive 2D- and 3D-CFD investigations with four codes (Xfoil, MSES, ANSYS fluent, and DLR-tau) were performed, including implementation inside a generic 10 MW test-blade (CIG10MW). Comparison with results from Blade Element Momentum (BEM) methods and the estimation of 3D effects due to the rotating blade were undertaken. One specific shape (with a pronounced flat-back) was selected and tested in the Deutsche WindGuard aeroacoustic Wind Tunnel (DWAA), in Bremerhaven, Germany. A total of 34 polars were measured, included two trailing edge shapes and aerodynamic devices such as vortex generators, gurney flaps, zig-zag tape, and a splitter plate. Considerable changes in lift and drag characteristics were observed due to the use of aerodynamic add-ons. With the studies presented here, we believe we have closed an important technological gap.

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风力涡轮机叶片超厚空气动力剖面的开发与测量

考虑到当前的限制因素，我们设计了 60% 厚的翼面，以改善风力涡轮机转子叶片根部区域的气动性能。经过广泛的文献查阅和专利研究，我们建立了一套设计方法（包括考虑简单制造），并使用四种代码（Xfoil、MSES、ANSYS fluent 和 DLR-tau）进行了广泛的二维和三维 CFD 研究，包括在通用 10 MW 试验叶片 (CIG10MW) 中的实施。与叶片元素动量（BEM）方法的结果进行了比较，并对旋转叶片的三维效应进行了估算。在德国不来梅港的 Deutsche WindGuard aeroacoustic Wind Tunnel (DWAA) 中选择并测试了一种特定形状（具有明显的平背）的叶片。共测量了 34 个极点，包括两种后缘形状和空气动力装置，如涡流发生器、襟翼、之字形胶带和分流板。由于使用了空气动力附加装置，升力和阻力特性发生了显著变化。通过本文介绍的研究，我们相信我们已经缩小了一个重要的技术差距。

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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