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<p>A novel serrated Gurney flap (SGF) is presented in this work, and its effects on the aerodynamic performance of a tiltrotor wing are analyzed using computational fluid dynamics techniques. The Reynolds-averaged Navier-Stokes equations are employed to simulate the flow structure around the SGF using the Spalart-Allmaras turbulence model. The results show that the SGF improves aerodynamic performance compared with the baseline wing. Although the lift coefficient of the SGF is decreased compared with the plain Gurney flap (PGF), the lift-to-drag ratio is increased. Further research reveals that increasing the serration height causes greater decreases in lift, drag, and nose-down pitching moment coefficients, whereas serration width affects these coefficients very little. It is demonstrated that the most important factor for SGF is its windward area.</p>

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Numerical investigation on aerodynamic characteristics of a tiltrotor wing with serrated Gurney flap

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  • 发表日期：

    2026年6月22日

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  • Hao Chen

摘要

A novel serrated Gurney flap (SGF) is presented in this work, and its effects on the aerodynamic performance of a tiltrotor wing are analyzed using computational fluid dynamics techniques. The Reynolds-averaged Navier-Stokes equations are employed to simulate the flow structure around the SGF using the Spalart-Allmaras turbulence model. The results show that the SGF improves aerodynamic performance compared with the baseline wing. Although the lift coefficient of the SGF is decreased compared with the plain Gurney flap (PGF), the lift-to-drag ratio is increased. Further research reveals that increasing the serration height causes greater decreases in lift, drag, and nose-down pitching moment coefficients, whereas serration width affects these coefficients very little. It is demonstrated that the most important factor for SGF is its windward area.