高超, 贾娅娅, 刘庆宽. 相对厚度对翼型气动特性的影响研究[J]. 工程力学, 2020, 37(S): 380-386. DOI: 10.6052/j.issn.1000-4750.2019.04.S062
引用本文: 高超, 贾娅娅, 刘庆宽. 相对厚度对翼型气动特性的影响研究[J]. 工程力学, 2020, 37(S): 380-386. DOI: 10.6052/j.issn.1000-4750.2019.04.S062
GAO Chao, JIA Ya-ya, LIU Qing-kuan. EFFECT OF RELATIVE THICKNESS ON AERODYNAMIC PERFORMANCE OF AIRFOIL[J]. Engineering Mechanics, 2020, 37(S): 380-386. DOI: 10.6052/j.issn.1000-4750.2019.04.S062
Citation: GAO Chao, JIA Ya-ya, LIU Qing-kuan. EFFECT OF RELATIVE THICKNESS ON AERODYNAMIC PERFORMANCE OF AIRFOIL[J]. Engineering Mechanics, 2020, 37(S): 380-386. DOI: 10.6052/j.issn.1000-4750.2019.04.S062

相对厚度对翼型气动特性的影响研究

EFFECT OF RELATIVE THICKNESS ON AERODYNAMIC PERFORMANCE OF AIRFOIL

  • 摘要: 为了更好地了解相对厚度对风力机翼型气动特性的影响,该文以NACA4412、NACA4415、NACA4418这3种不同厚度的翼型为研究对象,分析了翼型相对厚度对翼型升阻力系数、升阻比、流场和压力系数的影响。研究结果表明:在小攻角时,随着厚度的增大,翼型的升阻比逐渐减小;在大攻角时,NACA4415和NACA4418翼型仍能保持较高的升阻比,而NACA4412翼型升阻比较低;随着攻角的增大,3种翼型均出现气流分离并形成尾部涡,NACA4412翼型比NACA4415和NACA4418翼型的尾部涡分布范围大。研究结果为风力机叶片的设计以及优化提供了参考依据。

     

    Abstract: In order to understand the effect of relative thickness on aerodynamic characteristics of wind airfoils, three airfoils with different thickness of NACA4412, NACA4415 and NACA4418 were studied. The influences of relative thickness of airfoils on lift and drag coefficient, lift-drag ratio, flow field and pressure coefficient of airfoils were analyzed. The results show that the lift-drag ratio of airfoils decreases with the increase of thickness when the angle of attack is small. At large angles of attack, NACA4415 and NACA4418 airfoils still have high lift-drag ratios, while NACA4412 airfoil has lower lift-drag ratio. With the increase of attack angle, three airfoils all exhibit airflow separation and the formation of tail vortex. NACA4412 airfoil has a larger tail vortex distribution than NACA4415 and NACA4418 airfoils. The results provide a reference for the design and optimization of wind turbine blades.

     

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