用于飞行实时仿真的微下击暴流建模研究

Research on Modeling of Microburst for Real Time Flight Simulation

分析了微下击暴流的特征和用于飞行实时仿真中的建模需求。基于流体力学的涡环原理构建三维微下击暴流的参数化模型,并对涡环法建模进行了深入改进。基于流体力学方法解决了涡环法模型的中心轴处和涡核内的奇异问题。针对真实微下击暴流风场的特点,设计了倾斜涡环模型和多涡环模型,从而高逼真度地模拟复杂的微下击暴流风场。简要讨论了该模型在飞行实时仿真中的应用方法。该建模方法灵活性高,可重配置,不仅可用于变化风场中的飞行实时仿真,还可用于对实际风场测量数据进行辨识建模和再现研究。

The characteristics of microburst and its modeling requirements in real time flight simulation were analyzed. A pa- rameterized three-dimensional microburst model was built based on ring-vortex principle which was thoroughly improved The singular problems on vortex core and central axis of ring-vortex were solved by the principle of fluid mechanics. According to the characteristics of real wind field of microburst, tilted ring-vortex and multiple ring-vortex models were built. Based on these methods, a complex microburst could be simulated with high fidelity, The application method on how to embed the model to real time flight simulation was briefly discussed. Given its flexibility and re-configurability, the microburst modeling method can be not only used in real time flight simulation under complex atmospheric disturbance, but also used to identify and reproduce the real wind field based on observation data.