STUDY ON ROUGHNESS SENSITIVITY OF WIND TURBINE AIRFOILS AFFECTED BY TRAILING-EDGE THICKNESS

Huang Chenwu; Wang Taoping

doi:10.19912/j.0254-0096.tynxb.2020-0482

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (2) : 486-491. DOI: 10.19912/j.0254-0096.tynxb.2020-0482

STUDY ON ROUGHNESS SENSITIVITY OF WIND TURBINE AIRFOILS AFFECTED BY TRAILING-EDGE THICKNESS

Huang Chenwu, Wang Taoping

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Abstract

The surface roughness of wind turbine blade caused by pollution, especially the surface roughness of leading edge, is an important factor of power loss. In this paper, the effect of trailing edge thickness on roughness sensitivity of DU93-W-210, DU91-W2-250 and DU97-W-300 airfoils after trailing edge modification is studied by using vortex panel method and RANS method. To simulate the leading edge contamination of airfoil, the fixed transition is set in the vortex panel method. And the serrated boundary condition is set in RANS method. It is found that the leading edge pollution causes the decrease of the suction peak, and induces the reduction of the airfoil aerodynamic performance. However, with the appropriate increase of the trailing edge thickness, the decline rates of the maximum lift drag ratio and the design lift coefficient （i.e. aerodynamic performance） show a decreasing trend. It indicates that the roughness sensitivity of wind turbine blade can be effectively reduced by increasing the trailing edge thickness.

Key words

wind turbines / blade / flow simulation / roughness sensitivity / trailing-edge thickness

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Huang Chenwu, Wang Taoping. STUDY ON ROUGHNESS SENSITIVITY OF WIND TURBINE AIRFOILS AFFECTED BY TRAILING-EDGE THICKNESS[J]. Acta Energiae Solaris Sinica. 2022, 43(2): 486-491 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0482

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