06/00226 Theoretical and experimental study on the aerodynamic characteristics of a horizontal axis wind turbine

Wind turbines inevitably experience yawed flows, resulting in fluctuations of the angle of attack (AOA) of airfoils, which can considerably impact the aerodynamic characteristics of the turbine blades. In this paper, a horizontal-axis wind turbine (HAWT) was modeled using a structured grid with multiple blocks. Then, the aerodynamic characteristics of the wind turbine were investigated under static and dynamic yawed conditions using the Unsteady Reynolds Averaged Navier-Stokes (URANS) method. In addition, start-stop yawing rotations at two different velocities were studied. The results suggest that AOA fluctuation under yawing conditions is caused by two separate effects: blade advancing & retreating and upwind & downwind yawing. At a positive yaw angle, the blade advancing & retreating effect causes a maximum AOA at an azimuth angle of 0°. Moreover, the effect is more dominant in inboard airfoils compared to outboard airfoils. The upwind & downwind yawing effect occurs when the wind turbine experiences dynamic yawing motion. The effect increases the AOA when the blade is yawing upwind and vice versa. The phenomena become more dominant with the increase of yawing rate. The torque of the blade in the forward yawing condition is much higher than in backward yawing, owing to the reversal of the yaw velocity.

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Experimental study on small scale horizontal axis wind turbine of analytically-optimized blade with linearized chord twist angle profile

Energy ◽

10.1016/j.energy.2020.119304 ◽

2021 ◽

Vol 216 ◽

pp. 119304

Author(s):

Ali M. Abdelsalam ◽

W.A. El-Askary ◽

M.A. Kotb ◽

I.M. Sakr

Keyword(s):

Experimental Study ◽

Wind Turbine ◽

Twist Angle ◽

Horizontal Axis ◽

Small Scale ◽

Horizontal Axis Wind Turbine

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D211 Experimental Study on Horizontal Axis Wind Turbine Generation System under Real Wind Condition System

The Proceedings of the National Symposium on Power and Energy Systems ◽

10.1299/jsmepes.2011.16.359 ◽

2011 ◽

Vol 2011.16 (0) ◽

pp. 359-362

Author(s):

Toshiyuki ASO ◽

Katsuya IIDA ◽

Tomoyuki AIDA ◽

Akihiro UNNO ◽

Yuuki HAYASHI ◽

...

Keyword(s):

Experimental Study ◽

Wind Turbine ◽

Horizontal Axis ◽

Wind Condition ◽

Generation System ◽

Horizontal Axis Wind Turbine

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Field Experiment of Blade Surface Pressure of a HAWT

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.291-294.445 ◽

2013 ◽

Vol 291-294 ◽

pp. 445-449

Author(s):

De Shun Li ◽

Ren Nian Li

Keyword(s):

Experimental Study ◽

Numerical Calculation ◽

Wind Tunnel ◽

Field Experiment ◽

Wind Turbine ◽

Surface Pressure ◽

Pressure Sensors ◽

Horizontal Axis ◽

Blade Surface ◽

Horizontal Axis Wind Turbine

Field experimental study is performed on a 33 kW horizontal axis wind turbine with rotor diameter of 14.8 m. The distribution of pressure is gathered by disposed 191 taped pressure sensors span-ward on seven particular sections of a blade. The results will provide a comparative basis to wind tunnel experiment and numerical calculation of the flow of the wind turbine.

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