大型飞机穿越微下冲气流的纵向特性分析  

Longitudinal Characteristics Analysis of Large Aircraft Flying Through Micro-Downburst

作　　者：黄楚云 洪冠新[1] HUANG Chu-yun;HONG Guan-xin(School of Large Aircraft, Beijing University of Aeronautics and Astronautics, Beijing 100191, China)

机构地区：[1]北京航空航天大学大飞机班,北京100191

出　　处：《飞机设计》2017年第6期26-28,48,共4页Aircraft Design

摘　　要：根据流体力学雷诺时均方程,采用的CFD数值模拟方法对微下冲气流流场进行模拟分析,建立适合于飞行力学研究和飞行仿真的微下冲气流模型。之后建立了含扰动风参数的飞机动力学模型,并对飞机穿越微下冲气流的纵向响应特性进行仿真分析。结论表明,CFD模拟的微下冲气流能有效地反映出风场内部的流动特征。微下冲气流导致飞机高度急剧降低,高度余量不足时,容易发生撞地危险。A micro-downburst model for flight mechanics research and simulation was established according to the simulation and analysis of micro-downburst using CFD numerical simulation of impacting jet flowmodel based on reynolds-averaged equations.With that,the aircraft dynamic model with gust turbulence was established and the longitudinal characteristics analysis of aircraft flying through micro-downburst was performed.The results indicated that the micro-downburst simulated by CFD was able to effectively reflect the flowcharacteristics inside the wind field.The micro-downburst causes the rapid height descending which,without adequate height margin,leads to bad inclination of collision with ground.

关 键 词：大型飞机 微下冲气流 CFD 纵向特性 

分 类 号：V221[航空宇航科学与技术—飞行器设计]