Understanding Aerodynamic Characteristics of Three Dimensional Wing at Low Reynolds Numbers toward Realization of a Mars Airplane

为了获得实现火星飞机在火星大气中飞行的主翼或尾翼的工程设计准则，阐明了低雷诺数下三维机翼设计参数与空气动力特性之间的关系，并获得了引起空气动力变化的流体动力学机理的知识。此外，还进行了火星飞机缩尺模型的气动特性风洞试验。在低雷诺数时，操纵面的有效性变低。这是由于尾翼的非线性气动特性，通过合理的尾翼设计，成功地提高了操纵面的有效性

To obtain engineering design guidelines of main wings or tails toward realization of a Mars airplane that flies in the very rare Martian atmosphere, the relationship between design parameters of a three dimensional wing and aerodynamic characteristics at low Reynolds numbers are clarified and knowledge about fluid dynamic mechanisms which causes aerodynamic changes is obtained. Besides, wind tunnel tests on aerodynamic characteristics of a Mars-airplane scale model are conducted. Effectiveness of control surfaces becomes low at low Reynolds numbers. This is due to nonlinear aerodynamic characteristics of a tail airfoil and the effectiveness of control surfaces is improved successfully by a proper tail airfoil