零航速减摇鳍升力特性数值研究

Research on Lift Characteristics of Zero-speed Fin Stabilizer

为了探究零航速减摇鳍周期摆动时产生的升力与转动频率、转角幅度、转轴位置以及来流速度几方面的关系,本文运用滑移网格技术对二维NACA0012翼型的周期摆动进行数值预报。研究表明:Transition SST湍流模型较其他常见湍流模型更适合分析大攻角周期摆动问题;对于转动方式满足余弦函数的减摇鳍,产生的升力随转角幅度、转动频率增加而增大,来流速度对升力的影响大于转轴位置。论文研究对零航速减摇鳍选型设计具有一定指导意义。

To explore the influence from rotational frequency, angle range, rotor position and flow velocity to the cyclic swing lift of Zero-speed Fin Stabilizer, the numerical forecast to the cyclic swing of two-dimensional NACA0012 airfoils is carried out with the sliding mesh technique. The following conclusions can be obtained： Transition SST turbulence model is more appropriate to analysis the cyclic swing at high angles of attack that other turbulence models; to the fin stabilzer with the rotating mode meeting the cosine function, the lift increased with the increasing of angle range and rotational frequency, and the influence from the flow velocity to the lift is more than the influence from the rotor position. The research is of guiding significance to the type selection and design of zero-speed fin stabilizer.