The Effect of Various Wedge Flap Configurations on the Performance of Wind Turbine Airfoil

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL

Iranian Journal of Science and Technology-Transactions of Mechanical Engineering Pub Date : 2024-01-11 DOI:10.1007/s40997-023-00743-w

Asmail A. M. Abdalkarem, Ahmad Fazlizan, Wan Khairul Muzammil, Chin Haw Lim, Adnan Ibrahim, Kok Hoe Wong, Hussein A. Kazem

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引用次数: 0

Abstract

Controlling turbulent flow to improve wind turbine airfoils' aerodynamic characteristics is a desirable task. The current study evaluated the potential of adding a wedge flap (WF) at the trailing edge of the NACA0021 airfoil. The effect of different WF heights and lengths on optimum height (L/H) on the aerodynamic performance and flow over the airfoil has been studied numerically using two-dimensional computational fluid dynamics simulation. The simulation solves the Reynolds-Averaged-Navier–Stokes with shear stress transport k–ω turbulent model. The results indicate that adding WF can effectively suppress flow separation and improve aerodynamic efficiency in all studied cases compared to clean airfoil. The aerodynamic performance is influenced significantly by the height of WF compared to the slight influence by the length at L/H < 1. Inclined WF achieves the highest lift and lift-to-drag values with total maximum increments of 71.67% and 45.79%, respectively, at optimum height and length with 6%c and 1%c, respectively, in comparison with the clean airfoil case. The results observed that WFs have advantages over the Gurney flaps discussed in this study. WF appears to be an effective passive flow control device that can be used in wind turbines if its dimensions are properly chosen.

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各种楔形襟翼配置对风力涡轮机机翼性能的影响

控制湍流以改善风轮机翼的气动特性是一项理想的任务。目前的研究评估了在 NACA0021 机翼后缘添加楔形襟翼 (WF) 的潜力。通过二维计算流体动力学模拟，对不同的 WF 高度和最佳高度长度 (L/H) 对气动性能和翼面气流的影响进行了数值研究。仿真求解了带有剪应力传输 k-ω 湍流模型的雷诺平均纳维尔-斯托克斯模型。结果表明，与清洁机翼相比，在所有研究案例中添加 WF 都能有效抑制气流分离，提高气动效率。在 L/H < 1 时，气动性能受 WF 高度的影响较大，而受长度的影响较小。与清洁翼面相比，倾斜 WF 在最佳高度和长度（6%c 和 1%c）下获得了最高的升力和升阻比值，最大增量分别为 71.67% 和 45.79%。结果表明，WF 比本研究中讨论的 Gurney 襟翼更具优势。如果尺寸选择得当，WF 似乎是一种有效的被动流量控制装置，可用于风力涡轮机。

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

Iranian Journal of Science and Technology-Transactions of Mechanical Engineering ENGINEERING, MECHANICAL-

CiteScore

2.90

自引率

7.70%

发文量

审稿时长

>12 weeks

期刊介绍： Transactions of Mechanical Engineering is to foster the growth of scientific research in all branches of mechanical engineering and its related grounds and to provide a medium by means of which the fruits of these researches may be brought to the attentionof the world’s scientific communities. The journal has the focus on the frontier topics in the theoretical, mathematical, numerical, experimental and scientific developments in mechanical engineering as well as applications of established techniques to new domains in various mechanical engineering disciplines such as: Solid Mechanics, Kinematics, Dynamics Vibration and Control, Fluids Mechanics, Thermodynamics and Heat Transfer, Energy and Environment, Computational Mechanics, Bio Micro and Nano Mechanics and Design and Materials Engineering & Manufacturing. The editors will welcome papers from all professors and researchers from universities, research centers, organizations, companies and industries from all over the world in the hope that this will advance the scientific standards of the journal and provide a channel of communication between Iranian Scholars and their colleague in other parts of the world.