Dihedral influence on lateral-directional dynamic stability on large aspect ratio tailless flying wing aircraft

作者：Song Lei; Yang Hua^*; Zhang Yang; Zhang Haoyu; Huang Jun

来源：Chinese Journal of Aeronautics, 2014, 27(5): 1149-1155.

DOI：10.1016/j.cja.2014.08.003

• Dihedral angle
• Flying wing
• Optimization
• Stability
• Tailless

The influence of dihedral layout on lateral-directional dynamic stability of the tailless flying wing aircraft is discussed in this paper. A tailless flying wing aircraft with a large aspect ratio is selected as the object of study, and the dihedral angle along the spanwise sections is divided into three segments. The influence of dihedral layouts is studied. Based on the stability derivatives calculated by the vortex lattice method code, the linearized small-disturbance equations of the lateral modes are used to determine the mode dynamic characteristics. By comparing 7056 configurations with different dihedral angle layouts, two groups of stability optimized dihedral layout concepts are created. Flight quality close to Level 2 requirements is achieved in these optimized concepts without any electric stability augmentation system.

• 出版日期2014-10
• 单位北京航空航天大学