EXPERIMENTAL STUDY ON EFFECT OF DUST PARTICLES ON AERODYNAMIC CHARACTERISTICS OF AIRFOILS

Ma Gaosheng; Wang Xuzhe; Wang Yan; Kong Lingduo; Luo Fengyang

doi:10.19912/j.0254-0096.tynxb.2025-0445

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (9) : 662-671. DOI: 10.19912/j.0254-0096.tynxb.2025-0445

EXPERIMENTAL STUDY ON EFFECT OF DUST PARTICLES ON AERODYNAMIC CHARACTERISTICS OF AIRFOILS

Ma Gaosheng^1,2, Wang Xuzhe¹, Wang Yan^1,2, Kong Lingduo¹, Luo Fengyang¹

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Abstract

The study of aerodynamic characteristics for airfoils in sand-laden environments predominantly employs numerical simulation methods, yet inconsistencies in models and assumptions during simulations have led to divergent conclusions regarding sand particle effects on airfoil performance. This paper experimentally investigates the aerodynamic behavior of the S809 wind turbine airfoil in sandy conditions through wind tunnel testing, focusing on lift/drag coefficient variations, flow field patterns, and particle dynamics under different sand particle sizes （characterized by Stokes number, St） and concentration levels. Key experimental findings reveal： 1） Under varying St conditions, the lift coefficient initially increases then decreases with rising St values while the drag coefficient shows gradual growth; at 20° and 24° angles of attack, enhanced velocity distribution emerges with increasing St, accompanied by modified vortex structures and downstream migration of separation points toward the trailing edge. 2） Within the 20°-28° angle of attack range, lift coefficients exhibit a positive correlation with dust concentration under varied concentration conditions, while elevated concentrations reduce suction surface velocity and drive upstream displacement of separation points toward the leading edge at 20° and 24° angles of attack. 3） Higher dust concentrations shift particle accumulation toward the airfoil’s trailing edge region, whereas increased St values reduce particle density within vortex separation zones; comparative analysis of particle distribution across attack angles demonstrates that steeper angles progressively concentrate sand particles near the airfoil’s leading edge.

Key words

wind turbine airfoil / two-phase flow / wind tunnel / S809 / aerodynamic performance / particle image velocimetry （PIV）

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Ma Gaosheng, Wang Xuzhe, Wang Yan, Kong Lingduo, Luo Fengyang. EXPERIMENTAL STUDY ON EFFECT OF DUST PARTICLES ON AERODYNAMIC CHARACTERISTICS OF AIRFOILS[J]. Acta Energiae Solaris Sinica. 2026, 47(9): 662-671 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0445

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