变后掠变展长翼身组合体系统设计与特性分析

为了探索可变形飞行器气动、结构和控制关键技术,在可变后掠角及展长的翼身组合体风洞试验模型系统设计与特性分析方面开展了研究。系统设计包括总体方案设计、近似理论分析与计算流体力学(CFD)数值模拟、结构与控制技术集成;特性分析包括结构特性、控制特性、定常与非定常气动特性的测试及其分析。结果表明:大尺度变形能显著改变飞行器的升力、阻力和升阻比等气动特性,进而使可变形飞行器能适应多种环境和任务,因而在全飞行周期中比传统固定外形飞行器具有更优的性能。

System Design and Characteristics Analysis of a Variable-sweep and Variable-span Wing-body

In order to investigate the key technological issues concerning the aerodynamics, structure and control of morphing flight vehicles, a system design and characteristics analysis on a wind tunnel model of a variable-sweep-and-span morphing wing-body is conducted. The system design include the overall design, approximate theoretical analysis, computational fluid dynamics (CFD) numerical simulation as well as the integration of structure and control technologies; the characteristics analysis include the test and analysis of structural and control characteristics as well as the test and analysis of steady and unsteady aerodynamic characteristics. The results demonstrate that large scale morphing can considerably change the aerodynamic characteristics of a flight vehicle, such as its lift, drag and lift-to-drag ratio, etc., which can enable the adaptation of morphing flight vehicles in multi-environments and multi-missions, and ultimately lead to better performance for morphing flight vehicles in comparison with conventional fixed-configuration flight vehicles.