缺陷翼型的动态失速特性研究

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中图分类号：TM315 文献标志码：A 文章编号：1672-1098（2025）01-0042-07

Abstract：ObjectiveInorder to study thedynamic stallcharacteristicsof the defective airfoil sincethe blades wil be coroded to varying degrees and the aerodynamic performance willbe reduced when the wind turbine works in the wind-sand environment.Methods The sinusoidal oscilltion dynamic stallof S8O9 airfoil was simulated by SST （204号 k-ω turbulence model，showing good consistencycompared with the US OSU wind tunnel test data，basedonwhich the dynamic stallof S809 airfoil with the circular，triangular and rectangular defect shapes （the defect depth was 号 h/c=1% ）ofthe leading edgewas studied.Results It was found that the leading edge defects made the flow separation point move forward，and the flow attachment angledecreased accordingly.The airfoil pitching down process would lead tothe decreaseof the airfoil trailing edge stallvortexadhesionand slip tothe trailing edge.After entering the deep stall，the vortex shedding frequency of the airfoil pitching down stage was greater than that of the pitching up stage.Conclusion The leading edge defects have little fect on the unsteady aerodynamic coefficient of airfoil atsmallangle of attack.In the high angle of attack stage，the leading edge defects havea significant effct onthe lift，drag coefficient and lift-drag ratioof theairfoil.Theaerodynamiccoefficientchanges rapidlyand thedrag coeffcient increases sharply.The research results can provide important reference value for the design and maintenance of wind turbine airfoils and blades in harsh environments.

Key Words ：defective airfoil;leading edge defect shape;dynamic stall; numerical simulation

我国风电机组的安装主要分布在湿润多雨的东南沿海地区和风沙活动频繁的内陆荒漠区[1]风力机叶片经过长时间的风沙、雨水冲刷后会导致叶片表面出现腐蚀缺陷，且缺陷主要集中于前缘部分[2-3]。（剩余7009字）