Wind tunnel testing of a horizontal axis wind turbine rotor and comparison with simulations from two Blade Element Momentum codes

Monteiro, Joaquim; Silvestre, Miguel; Piggott, Hugh; André, Jorge

doi:10.1016/j.jweia.2013.09.008

Cited by 64 publications

(31 citation statements)

References 12 publications

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“…For other TSR, the Cp values at each wind speed are shown in Table 1. Similar finding was reported by Monteiro et al [24]. In their study, this phenomenon was believed to be reasonable, since the blade lift-to-drag ratio improved with the Reynolds number which was in proportion to the wind speed.…”

Section: Experiments Results Of Unfolded Blade Power Coefficientsupporting

confidence: 91%

Wind tunnel experiments for innovative pitch regulated blade of horizontal axis wind turbine

Xie

Zhang

Lei

2015

Energy

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Section: Experiments Results Of Unfolded Blade Power Coefficientsupporting

confidence: 91%

Wind tunnel experiments for innovative pitch regulated blade of horizontal axis wind turbine

Xie

Zhang

Lei

2015

Energy

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“…It was observed that the model tested with higher wind velocity gave slightly more power coefficient, except on the case of the pitch angle of 20 degree, because the aerodynamic loads of the blade profile, lift to drag ratio, were improved by Reynolds numbers. A similar result was reported by Monteiro et al [12] and Kishore and Priya [13]. For another result, it was apparent that the pitch angle of 10 degrees presented maximum power coefficient of 0.27, or the efficiency of 27%, because this pitch angle was an optimum point creating the greatest blade profile of the Thai sail windmill causing to get an optimum angle of attack and produces maximum lift to drag ratio and the shaft torque.…”

Section: Resultssupporting

confidence: 82%

Untitled

2017

JESR

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Conventional Thai sail windmill is a horizontal axis wind turbine for which a rotor is mounted in upstream position, upwind type, and there is no yaw control system. A yaw control system is mostly preferred for all horizontal axis wind turbines because it can help rotor face perpendicularly to all wind directions in order to avoid wind energy loss so that it can produce more annual energy production. Both small and medium scale of the upwind type normally can have a passive yaw control system by using a tail fin, while the downwind type is able to work as a passive yaw mechanism by itself. Although an efficiency of the downwind rotor is slightly less than of the upwind rotor, the downwind rotor does not need to equip any tail fin for working as a yaw control system. Therefore, if an efficiency of upwind and downwind rotor is likely to be similar, the downwind rotor should be better choice. The purpose of this study is to examine and compare an efficiency of upwind and downwind Thai sail windmill. For the experiment, 1.0 meter in diameter model was built and tested by tow testing method. Results showed that the maximum efficiency of upwind and downwind Thai sail windmill model was about 27% and 25%, respectively. Although the downwind model gave the maximum efficiency slightly less than the upwind model, it gave much more advantages such as being a passive yaw control system, which can make more annual energy production and use only one pole which can help reduce a construction cost.

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“…First, a detailed literature survey was performed on various wind turbine rigs designed to measure C P and C T for scaled wind turbines. [9][10][11][12][13] The general conclusions from the literature survey was that the unconed blade diameter should be maximized to ensure that the blade section Reynolds number is maximized. The blade section Reynolds number is maximized to limit low Reynolds number effects.…”

Section: B Experimental Apparatusmentioning

confidence: 99%

Subscale Testing of Horizontal-Axis Wind Turbines

Ananda

Bansal

Selig

2017

35th AIAA Applied Aerodynamics Conference

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This paper discusses the development of wind tunnel test capabilities at the University of Illinois at Urbana-Champaign to obtain the aerodynamic performance of highly-coned subscale wind turbine rotor configurations as part of the ARPA-E funded project to design extreme-scale Segmented Ultralight Morphing Rotors (SUMR). The scaled rotors were designed to be configurable for various coning and pitch angles. Many challenges were associated with testing at these small scales numbers due to the small forces generated, Reynolds number effects, and the high rotor rotation rates required. Rotors were tested at freestream velocities from 4.5 m/s to 9.5 m/s at various coning angles (0 to 50 deg) and pitch angles (4-8 deg). The results obtained can be used to further validate blade element momentum theory (BEMT) codes developed for design and analysis of highly-coned rotors.

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Wind tunnel testing of a horizontal axis wind turbine rotor and comparison with simulations from two Blade Element Momentum codes

Cited by 64 publications

References 12 publications

Wind tunnel experiments for innovative pitch regulated blade of horizontal axis wind turbine

Wind tunnel experiments for innovative pitch regulated blade of horizontal axis wind turbine

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Subscale Testing of Horizontal-Axis Wind Turbines

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