关键词: 柔性叶片, 翼型, 柔性变形, 气动性能, 修正公式

Abstract: The deformation characteristics of flexible blade sizes NPU airfoil was selected as the research object, lift and drag coefficient and pitching moment coefficient calculation of different airfoil deformations to the string were carried out by using the Xfoil software and the correction formula of lift coefficient of airfoil calculation after deformation was summarized. The results show that the greater the chord bending deformations of the flexible blades, the greater the lift coefficients of the airfoils and the drag coefficients will increase slightly, but the lift drag ratio shows an overall increasing trend, which is beneficial to enhance the aerodynamic performance. The modified formula of aerodynamic characteristics after airfoil deformations is also in good agreement with the simulation results.

Key words: flexible blade, airfoil, flexible deformation, aerodynamic performance, correction formula