缺陷翼型的動態(tài)失速特性研究

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中圖分類號：TM315 文獻(xiàn)標(biāo)志碼：A 文章編號：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號 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 號 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

我國風(fēng)電機(jī)組的安裝主要分布在濕潤多雨的東南沿海地區(qū)和風(fēng)沙活動頻繁的內(nèi)陸荒漠區(qū)[1]風(fēng)力機(jī)葉片經(jīng)過長時間的風(fēng)沙、雨水沖刷后會導(dǎo)致葉片表面出現(xiàn)腐蝕缺陷，且缺陷主要集中于前緣部分[2-3]。（剩余7009字）