【作者】 汪超； 周超英； 张锐； 谢鹏；

【Author】 Wang Chao;Zhou Chaoying;Zhang Rui;Xie Peng;Shenzhen Graduate School,Harbin Institute of Technology;

【机构】 哈尔滨工业大学深圳研究生院；

【摘要】 为研究主动弯曲变形对前飞扑翼气动性能的影响,本文结合动态网格技术,采用计算流体力学方法求解二维非定常Navier-Stokes方程,分析了前飞扑翼气动力、能耗、飞行效率以及周围流场结构随变形相位角和变形幅度的变化规律。结果表明,变形相位角对于前飞柔性扑翼的气动性能有着重要的影响,在一定的变形相位角区间内,柔性前飞扑翼能同时产生相对刚性扑翼更大的时均推力和时均升力。柔性扑翼的推力效率和升力效率随变形幅值呈先增大后减小的趋势,适当的弯曲变形能增大柔性前飞扑翼的气动效率,而过度的弯曲变形则会使扑翼气动效率恶化。更多还原

【Abstract】 A numerical study on the effects of the active bending deformation on the aerodynamic performance of forward flapping wings is carried out through the solution of the unsteady Navier-Stokes equations using the dynamic grid technique and computational fluid dynamics methods.The effects of deformation phase angles and deformation amplitudes are considered,correspondingly the aerodynamic forces,the energy consumption and the flow structures of the wings are examined for the purpose.The results show that either the deformation phase angles or the deformation amplitudes can effectively alter the aerodynamic characteristics of the wing.It is found that the flexible wings with certain deformation phase angles can produce much larger time-averaged thrust forces and lift forces than the rigid wings.The thrust efficiency and lift efficiency increase first and then decrease with the increasing deformation amplitudes.The appropriate bending deformation can enhance the aerodynamic efficiency of the flexible forward flapping wings,and the excessive deformation will make the aerodynamic efficiency of the wings deteriorates.更多还原