NONLINEAR AEROELASTIC ANALYSIS OF 2D AIRFOIL BASED ON MODIFIED LB DYNAMIC STALL MODEL

Li Yuan; Yin Fanfu; Gao Wei; Miao Jichun; Shen Xin; Du Zhaohui

doi:10.19912/j.0254-0096.tynxb.2022-0396

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (7) : 402-408. DOI: 10.19912/j.0254-0096.tynxb.2022-0396

NONLINEAR AEROELASTIC ANALYSIS OF 2D AIRFOIL BASED ON MODIFIED LB DYNAMIC STALL MODEL

Li Yuan¹, Yin Fanfu², Gao Wei⁴, Miao Jichun^3,4, Shen Xin², Du Zhaohui²

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Abstract

Aeroelastic characteristic of 2D airfoil under nonlinear aerodynamics is studied based on a modified dynamic stall model. Begin with initial attached flow, the displacement and force signal are compared below and beyond the critical velocity. It’s found that the nonlinear aerodynamics mainly appears beyond the critical velocity. The comparison of stability is found affected by the definition of time whether dimensional or nondimensional. Changing mean angle of attack shows small influence when velocity under the critical, but considerable beyond the critical. One obvious variation is found on dynamic stall feature. For a separated at high angle of attack, different calculations reveal strong diversity and nonlinearity, and 1D tendency is found in all separated flutter cases.

Key words

wind turbines / airfoils / aerodynamic loads / aerodynamic stalling / flutter

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Li Yuan, Yin Fanfu, Gao Wei, Miao Jichun, Shen Xin, Du Zhaohui. NONLINEAR AEROELASTIC ANALYSIS OF 2D AIRFOIL BASED ON MODIFIED LB DYNAMIC STALL MODEL[J]. Acta Energiae Solaris Sinica. 2023, 44(7): 402-408 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0396

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