Time-accurate blade surface static pressure behaviour on a rotating H-Darrieus wind turbine

Du, Longhuan, Ingram, Grant and Dominy, Robert (2019) Time-accurate blade surface static pressure behaviour on a rotating H-Darrieus wind turbine. Wind Energy, 22 (4). pp. 563-575. ISSN 1095-4244

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Official URL: https://doi.org/10.1002/we.2307

Abstract

Time‐accurate blade pressure distributions on a rotating H‐Darrieus wind turbine at representative tip speed ratios during start‐up are presented here, which allow blade dynamic stall and laminar separation bubbles to be observed clearly and which provide a rare experimental demonstration of the flow curvature effect inherent in H‐Darrieus turbine operation. The convection of a dynamic stall vortex along the blade surface at high reduced frequency has also been clearly identified. This study provides new information of the complex aerodynamics of the vertical axis wind turbines (VAWTs) and provides unique experimental data to validate the transient blade static surface pressure distribution predicted by CFD models. To the best of the authors' knowledge, this is the first time that the instantaneous pressure variation around the blade has been measured and recorded directly for an H‐Darrieus wind turbine.

Item Type: Article
Uncontrolled Keywords: H‐Darrieus, wind turbine, flow curvature, dynamic stall, laminar separation bubble, blade surface static pressure
Subjects: H300 Mechanical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Paul Burns
Date Deposited: 21 Jan 2019 11:39
Last Modified: 11 Oct 2019 07:46
URI: http://nrl.northumbria.ac.uk/id/eprint/37669

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