Effects of the influence of triangular dimple and aspect ratio on NACA 4412 airfoil on the overall performance of H-Darrieus wind rotor: An experimental investigation

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Avulamanda Siva Nagaraju, Rajat Gupta, S. Bhowmik
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Abstract

This study examines how adjusting aspect ratio (AR) and adding triangular dimples to the airfoil can enhance H-type Darrieus wind rotor (H-rotor) performance under low wind speeds (4, 6, and 8 m/s) using wind tunnel testing. Results show optimal performance at an AR of 1.0 for both standard and Triangular dimple airfoil H-rotors, with variations at different wind speeds for other aspect ratios. Triangular dimple-equipped H-rotors demonstrate improved self-starting capability and a wider operational range of tip speed ratio (TSR) compared to standard rotors, ensuring reliability across diverse wind conditions. Moreover, the triangular dimple rotor achieves a nearly 13.6% increase in maximum coefficient of power ([Formula: see text]) compared to the dimple-free H-rotor at 4 m/s wind speed. This study underscores the efficacy of adjusting AR and integrating triangular dimple blades to enhance H-rotor performance, particularly in low wind speeds.
NACA 4412 翼面上的三角窝和长宽比对 H-Darrieus 风力转子整体性能的影响:实验研究
本研究通过风洞试验,探讨了在低风速(4、6 和 8 米/秒)条件下,调整高宽比(AR)和在机翼上添加三角窝如何提高 H 型达里厄斯风转子(H 型转子)的性能。结果表明,在 AR 值为 1.0 时,标准 H 型转子和三角窝翼 H 型转子的性能最佳,而在不同风速下,其他纵横比的性能会有所变化。与标准转子相比,配备三角窝的 H 型转子具有更强的自启动能力和更宽的翼尖速比 (TSR) 工作范围,从而确保了在各种风况下的可靠性。此外,在 4 米/秒的风速下,三角形凹槽转子的最大功率系数([计算公式:见正文])比无凹槽 H 型转子提高了近 13.6%。这项研究强调了调整 AR 和集成三角窝叶片以提高 H 型转子性能的有效性,尤其是在低风速条件下。
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
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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