Rationality research of the adjustment law for the blade pitch angle of H-type vertical-axis wind turbines

Lijun Zhang, Jiawei Gu, Huaibao Zhu, Kuoliang Hu, Xiang Li, Liuyang Jiao, Junjie Miao, Jing Liu and Zhiwei Wang

Renewable Energy, 2021, vol. 167, issue C, 484-496

Abstract: Pitch angle greatly affects the performance of VAWT. Aiming at the maximum value of CT, this study first obtains the theoretical optimal angles of attack, i.e., 17.7° and −18.4° in upwind and downwind zones. A 2.5D model is simulated using Fluent to determine the magnitude and direction of induced velocity, and an initial pitch angle adjustment law is obtained combining the proposed local TSR. Compared with a prototype wind turbine, CP is increased by 2.69% after applying the initial adjustment law. The fitting curve angle δ at the abrupt part of pitch angle is analyzed. The smaller the angle δ is, the more evident the performance improvement of VAWT becomes. CP is increased by 11.68% when the angle is δ = 0°. On this basis, the adjustment law corresponding to δ = 0° of 100°Keywords: Local tip speed ratio (local TSR); Optimal angle of attack; Output power coefficient; Pitch angle adjustment law; Vertical-axis wind turbine (VAWT) (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:167:y:2021:i:c:p:484-496

DOI: 10.1016/j.renene.2020.11.104

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