ANALYSIS OF INFLUENCE MACHISM OF VGS SHAPE PARAMETERS ON DYNAMIC STALL OF DU91-W2-250 AIRFOIL

Feng Junxin; Zhao Zhenzhou; Liu Huiwen; Meng Lingyu; Chen Ming; Jiang Ruifang

doi:10.19912/j.0254-0096.tynxb.2021-0611

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (12) : 368-374. DOI: 10.19912/j.0254-0096.tynxb.2021-0611

ANALYSIS OF INFLUENCE MACHISM OF VGS SHAPE PARAMETERS ON DYNAMIC STALL OF DU91-W2-250 AIRFOIL

Feng Junxin¹, Zhao Zhenzhou^1,2, Liu Huiwen¹, Meng Lingyu¹, Chen Ming¹, Jiang Ruifang¹

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Abstract

Taking the DU91-W2-250 airfoil segment as the research object, the influence of vortex generators （VGs） with different shapes on its dynamic stall is analyzed. The results show that changing the shape parameters of VGs has a greater impact on the lift increasing effect, but less impact on the drag reduction effect, and the rectangular VGs has a better lift increasing and drag reduction effect than that of the triangular VGs and the trapezoid VGs. From the action mechanism, the flow control is mainly affected by the intensity of VGs flow direction vortex. The results show that the flow direction vortex of rectangular VGs has strong strength, slow attenuation, strong ability of restraining flow separation, and more obvious effect of increasing lift. The rectangular VGs has the best aerodynamic performance. In the range of x/c=0.25~0.50, the flow mixing inside and outside the boundary layer of rectangular VGs is severe, and the effect of restraining flow separation is better.

Key words

wind turbines / flow control / aerodynamic performance / vortex generator / DU91-W2-250 / dynamic stall / shape parameter

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Feng Junxin, Zhao Zhenzhou, Liu Huiwen, Meng Lingyu, Chen Ming, Jiang Ruifang. ANALYSIS OF INFLUENCE MACHISM OF VGS SHAPE PARAMETERS ON DYNAMIC STALL OF DU91-W2-250 AIRFOIL[J]. Acta Energiae Solaris Sinica. 2022, 43(12): 368-374 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0611

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