微下击暴流的三维建模与预警仿真研究

Three-dimensional Modeling and Simulation of Microburst

风切变是一种特殊的大气现象,对飞机的飞行形成干扰,会对飞机飞行安全造成很大的危害。为解决上述问题,提出一种三维特征风场建模的方法来仿真微下击暴流。利用流体的数学特征,建立模型,进行风切变雷达回波的仿真,通过对危险因子的判定达到对风切变现象的勘测和预警。风场建模方法以典型微下击暴流为目标,根据流体数学模型,建立了以速度场为特征,风场特征可调的微下击暴流风场,并对所建立的风场进行了分类。随后进行雷达回波信号仿真,结果表明所仿真的风场的确具有风切变特征,并可通过信号处理方法进行危险因子的判决分析,用来完成机载雷达对于风切变预警,并证明特征风场的正确性和有效性。为进一步的风切变信号处理方法提供了基础,有助于提高飞机飞行的安全系数。

Windshear is one of the most dangerous factors which affect the safety of plane flight.For computer simulations are applied in the extensive research on windshear,a modeling method of the wind field was proposed.This method built a velocity filed with the characteristic of microburst.With signal processing,danger factor was calculated for windshear warning.By modeling and simulating the echo signal of radar,this paper proves the feasibility of taking this wind field as research target,and provides a basis for further study of the signal processing method.