临近空间太阳能飞行器着陆状态阵风响应

Gust Loads in the Landing State of Solar-Powered Aircraft in Near Space

摘要:

对临近空间太阳能飞行器着陆状态时的阵风响应问题开展了数值模拟研究。针对该类飞行器质量轻、柔性大、降落时速度低的特点,基于 CFD/CSD松耦合分析法,利用网格速度法引入阵风载荷。以 1-cos阵风模型为基础,探讨了飞行器着陆状态遭遇二维阵风载荷时,其翼尖位移、扭转角、翼根所受结构整体弯矩以及升力系数的变化特性；并将二维阵风响应结果与一维阵风响应结果进行对比；获得了临近空间太阳能飞行器着陆时,二维阵风沿飞行器翼展方向的变化对其结构和气动性能的影响规律。

Abstract:

A numerical simulation study on the gust response problem of near-space solar-powered aircraft during the landing phase is conducted. Considering the characteristics of such aircraft of lightweight, high flexibility, and low land-ing speed, CFD/CSD loosely coupled analysis method is employed, and gust loads are introduced using the grid velocity method. Based on the 1-cos gust model, the changes of wingtip displacement, torsional angle, overall bending moment at the wing root, and lift coefficient when the aircraft encounters two-dimensional gust load during landing are investigated. The two-dimensional gust response results are compared with the one-dimensional gust response results. The effects of the two-dimensional gusts along the wingspan variation during landing on aircraft structure and aerodynamic performance is obtained. The research results are expected to provide reference and assistance for the development of similar aircraft.