四自由度飞机结冰脱落模拟研究

飞机表面的冰粒脱落可能会对安装在尾部的发动机和其他飞机部件造成破坏,直接影响到飞机的安全飞行。在对实际结冰脱落过程进行合理简化的基础上,建立了四自由度结冰脱落轨迹模型,应用3阶Runge-Kutta方法求解冰粒运动方程,并嵌入了气动阻尼对冰粒轨迹的影响;同时将计算得到的冰粒轨迹及转角与文献中的计算和试验结果进行了对比验证;最后模拟并分析了不同形状、尺寸、初始俯仰角及气动阻尼对于冰粒运动轨迹的影响,为飞机表面结冰脱落的进一步研究工作提供了参考。

Four Degree of Freedom Simulation of Ice Shedding for Aircraft Icing

Ice particles shed from aircraft surfaces are a safety concern because they can damage aft-mounted engines and other aircraft components.A four-degrees-of-freedom trajectory model for ice shedding is established in this paper based on reasonable simplification of actual ice shedding process.Then,the third order Runge-Kutta method is carried out to solve the equations of ice particles motion.The effects of air damping are also considered.Calculated results of trajectories and angle of pitch are compared with results of references and experiments respectively.At last ice shedding in different shapes,different sides,different initial angle of pitch and different air damping are simulated.In summary this paper provides a basis for ice shedding in the future.