The effect of gurney flap on flow characteristics of vertical axis wind turbine

Syawitri, Taurista Perdana, Yao, Yu-Feng, Yao, Jun and Chandra, Budi (2020) The effect of gurney flap on flow characteristics of vertical axis wind turbine. International Journal of Modern Physics B, 34 (14n16). p. 2040107. ISSN 0217-9792

Full content URL: https://doi.org/10.1142/S0217979220401074

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The effect of gurney flap on flow characteristics of vertical axis wind turbine
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Abstract

Recently, Gurney Flap (GF) has been used to improve the performance of Horizontal Axis Wind Turbine (HAWT) by enhancing its lift coefficient. Compared to HAWT, the research on GF application for Vertical Axis Wind Turbine (VAWT) is very limited. Moreover, most work studied a GF geometry attached to the trailing-edge of a stationary airfoil, without considering the rotating effect experienced by VAWT. For this reason, a three-straight-bladed VAWT rotating blades with GF is studied by transient RANS simulation together with a stress-blended eddy simulation turbulence model to investigate the GF height effect and the flow characteristics near the blade trailing-edge. Results have shown that by introducing the blade rotating, an optimum GF height is found to be 3% of the blade chord, slightly higher than 2% chord in a stationary airfoil case. In addition, the presence of GF can suppress deep stall of VAWT blades, thus eliminating negative instantaneous moment coefficient and improving the turbine performance.

Keywords:Stress-blended eddy simulation; Vertical axis wind turbine; Gurney flap; Delayed flow separation.
Subjects:H Engineering > H221 Energy Resources
H Engineering > H141 Fluid Mechanics
F Physical Sciences > F343 Computational Physics
H Engineering > H150 Engineering Design
H Engineering > H130 Computer-Aided Engineering
H Engineering > H321 Turbine Technology
Divisions:College of Science > School of Engineering
ID Code:41106
Deposited On:16 Jun 2020 15:26

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