作　　者： ; ; ; (索谦）;

机构地区： 西北工业大学航空学院

出　　处： 《航空工程进展》 2015年第1期26-31,共6页

摘　　要： 飞行器在大气中飞行,不可避免地受到阵风的影响。阵风所附加的气动载荷引发飞行器飞行状态的改变,过大幅值的阵风影响飞行的性能与安全。针对这种状况,首先采用改进的Lamb-Ossen涡模型,建立尾涡形式的阵风场;然后采用基于CFD技术的非定常N-S方程求解,并在计算网格中引入"网格速度"来模拟阵风,对SWIM(Subsonic Wall Interference Model)尾涡中的定常气动特性进行验证;最后通过CFD-6DOF的耦合,对SWIM俯冲穿越尾涡场的飞行轨迹进行研究。结果表明:计算结果与实验值符合较好;SWIM在尾涡中飞行时出现抖动、下沉、改变飞行状态、剧烈翻转的现象,与实际飞行器进入尾涡中的轨迹特性类似。 Aircraft flying in the air inevitably encounter the impact gust. The additional aerodynamic gust loads will lead to change the aircraft flight status, and strong gust will affect the performance and safety of aircraft in flight. In view of this situation, the improved Lamb-Ossen vortex model, is adopted and the gust field in the wake vortex form is built. Then based on CFD technology, unsteady N-S equations are solved, ＂grid speed＂ in the computing grid is introduced to simulate gusts, to verify steady aerodynamic characteristics of SWIM in the wake vortex. Finally, the steady aerodynamic characteristics of SWIM（Subsonic Wall Interference Model） in the trailing vortex and the flight path of SWIM diving across the trailing vortex field are studied by CFD-6DOF. Re- suits show that the calculation result is in good agreement with the experimental data, and the jitter, sinking, changing flight conditions, intense flip phenomena occur while SWIM flying in trailing vortex, which are similar with the trajectory characteristics of aircraft flying into the wake vortex.

关 键 词： 非定常 阵风响应 尾涡 轨迹仿真

领　　域： [航空宇航科学与技术]