飞机尾涡流场特征参数估算方法研究

摘要

尾流是飞行安全的重要影响因素.对尾特征流参数的定量估算方法是尾流探测、流场仿真和遭遇风险评估的基础.提出了一种基于垂直截面上尾涡诱导风场数据的尾涡特征参数计算方法,包括基于截面涡量数据的涡核位置判定方法、涡核半径计算方法和左右涡强度环量计算模型;以典型的流场仿真数据为例,计算分析了飞机尾涡流场中左右涡环量差、涡核位置、侧风等因素对估算效果的影响.结果表明,与P2P模型相比,模型在多种因素影响下的估算精度更加稳定.相关研究可用于激光雷达探测尾涡的特征参数计算,或者是基于CFD数值模拟实验数据的尾涡特征参数定量计算研究.%The aircraft wake vortex becomes one of the main limitations of the aircraft flight safety.The quantitative estimation of characteristics of wake vortex characteristic parameters is the basis of wake vortex detection,flow field simulation and risk assessment.This paper calculates the characteristics of wake vortex based on wind field on vertical sections,including determining the position of the vortex core,calculating core radius and calculating the left and right vortex circulation based on the section vorticity data.Taking the typical flow field simulation data as an example,the circulations of vortex,the locations of vortex core,and wind were compared for analysis and calculation.The results calculated by this model can calculate circulation accuratly at different circumstances compared to the method named P2P.The proposed models can be used in the study of wake vortex characteristic parameters estimation based on laser radar detection,or the quantitative calculation of wake vortex characteristic parameters based on the CFD numerical simulation experiment data.