双翼布局微型飞行器气动特性试验研究

通过低速风洞试验研究了使用双翼布局改善固定翼微型飞行器（MAV）气动性能的问题。首先比较不同平面形状单翼（齐莫曼翼和反齐莫曼翼）与双翼布局的气动特性。在此基础上为了优化低雷诺数范围内的双翼布局，研究不同几何参数对气动特性的影响，包括双翼不同的翼间距和交错位置以及不同的上下翼平面形状，并分析了造成这种气动性能差异可能存在的流场相互作用机理。研究表明，双翼布局能够改善单翼微型飞行器的气动性能，双翼之间的相对几何位置对其气动特性影响很大。通过不同平面形状上翼与下翼组合的比较发现，就最大升力和升阻比而言，上翼为齐莫曼翼、下翼为反齐莫曼翼且上翼位于下翼上游的布局较优。

Experimental investigation on the aerodynamic characteristics of biplane micro-air-vehicles

The present work investigates the possibilities of using the biplane configuration to improve the aerodynamic characteristics of fixed-wing MAVs through low speed wind tunnel experiments. The aerodynamic characteristics of different planform monoplane （including Zimmerman and inverse Zimmerman wing） and biplane configurations have been compared. In order to optimize the biplane configuration at low Reynolds number, the effects of different parameters, including different gaps, stagger positions and planform configurations, were studied. Based on the experimental results, the mechanism of flow field interaction was analyzed. The resuits show that the biplane configuration can improve the aerodynamic characteristics of monoplane fixed-wing MAVs ; the relative location of biplane has a significant effect on the aerodynamic characteristics of MAVs. Different planform wing combinations were also compared. Regarding to the maximum lift and lift to drag ratio, the configuration, in which the upper wing is a Zimmerman planform wing located upstream an inverse Zimmerman planform wing, is considered to be the better configuration.