RESEARCH ON EFFECT OF SOLIDITY ON AERODYNAMIC PERFORMANCE OF WIND TURBINES ROTOR WITH LOW WIND SPEED

Guo Shanshan; Han Qiaoli; Wang Yibo; Li Ming; Liu Dan

doi:10.19912/j.0254-0096.tynxb.2021-0031

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (8) : 373-381. DOI: 10.19912/j.0254-0096.tynxb.2021-0031

RESEARCH ON EFFECT OF SOLIDITY ON AERODYNAMIC PERFORMANCE OF WIND TURBINES ROTOR WITH LOW WIND SPEED

Guo Shanshan¹, Han Qiaoli², Wang Yibo¹, Li Ming², Liu Dan¹

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Abstract

In order to improve the utilization rate of wind energy in low wind speed areas, the effect of the rotor solidity on the aerodynamic performance of low wind speed wind turbines was studied. Considering the factors that affect the solidity of the rotor are the number of blades, the chord length and the setting angle. Blades with different chord lengths and adjustable setting angle hub were designed. When the setting angle changes, not only the solidity changes, but also the tip speed ratio changes. The in-truck test verifies that the influence of different setting angles on the aerodynamic performance of the wind turbine is mainly related to the tip speed ratio. According to the numerical simulation results of the pressure distribution on the surface of different rotors, it is concluded that under the same wind speed, the blade whose chord length gradually increases from the root to the tip is easier to start. Under the same conditions, the maximum difference of turbine between the experimental output power and the numerical simulation output power is 5.37%. It shows that the numerical simulation results are credible. With the increase of the solidity, the power coefficient of the rotor at 5 m/s wind speed shows an increasing trend, and the power coefficient shows a decreasing trend at 8 m/s wind speed. When the two trends intersect, the solidity is 25.38%. It can be obtained that the aerodynamic performance of the rotor is better under this solidity. And the rotor solidity suitable for low wind speed areas is obtained. It provides a reference for the optimal design of low wind speed wind turbine rotors.

Key words

wind turbines / aerodynamics / computational fluid dynamics / rotor / solidity / low wind speed

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Guo Shanshan, Han Qiaoli, Wang Yibo, Li Ming, Liu Dan. RESEARCH ON EFFECT OF SOLIDITY ON AERODYNAMIC PERFORMANCE OF WIND TURBINES ROTOR WITH LOW WIND SPEED[J]. Acta Energiae Solaris Sinica. 2022, 43(8): 373-381 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0031

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