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针对仿生飞行研究中具有重要应用前景的新型动力翼—半转翼的推力计算问题,提出了一种半转翼模型,导出了该模型参数的计算方法;基于XFLOW建立了两个半转翼CFD模型,即无固壁和有固壁半转翼模型,通过选择合理的流场计算区域和边界条件,采用湍流计算模型和刚性翼运动模型,结合半转翼实验模型参数和运动参数对半转翼流场速度、压力分布及推力进行了数值计算,获得了Weis-Fogh效应对半转翼运动流场特性和半转翼推力的影响规律,并与一个运动周期的实验推力进行了分析比较。研究结果表明:有固壁的半转翼流场中速度分布始终受到“急张”和“相拍”的影响,可大大提高半转翼的推力;由半转翼-固壁模型获得的推力计算曲线能真实反映半转翼推力的变化规律,这对计算不同参数的半转翼-固壁模型的推力具有参考价值。
Aiming at the problem of thrust calculation of a new type of aerodynamic wing-semi-rotor with important application prospect in bionic flight research, a semi-rotor model is proposed and its calculation method is derived. Based on XFLOW, two half- The model, that is, the solid-walled and semi-rotary wing model with solid wall, is selected by choosing the reasonable flow field calculation area and the boundary conditions. The turbulence model and the rigid wing motion model are used, Wing flow field velocity, pressure distribution and thrust were numerically calculated. The influence of Weis-Fogh effect on the flow field characteristics and half-rotor thrust of the half-rotor was obtained and compared with the experimental thrust of one cycle. The results show that the velocity distribution in the semi-rotating wing with solid wall is always affected by “emergency” and “phase”, which can greatly improve the thrust of the semi-rotating wing; The curve of the thrust obtained by the model can truly reflect the variation of the half-rotor’s thrust, which is of reference value for calculating the thrust of the semi-rotating wing-solid wall model with different parameters.