折叠翼飞机的气动特性分析

常规飞机具有单一的最优性能，折叠翼飞机通过改变机翼的折叠角度来改变飞机的气动性能，从而能够更好地完成多种任务。对折叠翼飞机进行建模并运用计算流体力学软件进行数值计算，根据计算结果分析折叠翼飞机的气动性能。结果表明：机翼折叠角度的改变，对飞机的失速迎角、俯冲性能、副翼操纵响应和纵横向操稳特性等产生很大影响；飞机失速迎角在机翼折叠后变大，飞机机翼折叠后飞机俯冲更迅速。

Aerodynamic Performance Analysis of Folding-wing Aircraft

Research on folding-wing aircraft is expanding in global research field. General aircraft shows characteristic of single optimum aerodynamic performance in executing missions. Folding-wing aircraft adapts to multiple-mission flight because aerodynamic performances can be changed if wings are folded or extended. This paper designed a folding-wing aircraft and used Computational Fluid Dynamics (CFD) simulating results to analyze the aerodynamic performance. The CFD simulating results indicate that the stalling angle, diving performance, aileron efficiency, longitudinal stability and controllability, lateral stability and controllability are affected strongly by the folding angle. The stalling angle of attack becomes large and the plane dives quickly if the wings are folded.