Turbulence effects on the wake flow and power production of a horizontal-axis wind turbine

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题名:	Turbulence effects on the wake flow and power production of a horizontal-axis wind turbine
作者:	朱佳仁;Chu, Chia-Ren;Chiang, Pei-Hung
贡献者:	工學院土木工程學系
关键词:	Grid-generated turbulence;Wake flow;Wake interference;Wind tunnel experiment;Wind turbine
日期:	2014-01-01
上传时间:	2026-04-21 13:44:47 (UTC+8)
出版者:	Elsevier;Elsevier Ltd
摘要:	摘要： This study experimentally investigated the effects of ambient turbulence on the wake flows and power production of a horizontal-axis wind turbine. The approaching flows included low-turbulence smooth flow and grid-generated turbulent flow. The profiles of time-averaged velocity, turbulence intensity and Reynolds stress from the intermediate to the far-wake regions were measured and compared for smooth and turbulent flows. Based on the measured data, prediction models for the centerline velocity deficit, turbulence intensity, wake radius and velocity profile were proposed. In addition, the experimental results showed that the power productions in the grid-generated turbulent flows were slightly higher than that in the smooth flow. But the power loss due to the velocity deficit in the wake flow was larger than 50% when the downwind distance was less than 12D (D is the rotor diameter). An empirical relation between the power production and the downwind distance x and lateral distance y was proposed. •The turbulence effects on the wake flow of a horizontal-axis wind turbine is studied.•A self-similar velocity profile for the turbine wake is developed.•The power loss due to the velocity deficit of the wake flow of upwind turbine is studied. 出版者： Elsevier Ltd 出版日期： 2014-01 出處： Journal of wind engineering and industrial aerodynamics, 2014-01, Vol.124, p.82-89 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2013 Elsevier Ltd 識別號： ISSN: 0167-6105 識別號： DOI: 10.1016/j.jweia.2013.11.001
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