翼型连续变形过程中非定常气动特性研究

可变形飞行器的优越性,使其成为近年来研究者关注的热点。当前对于可变形飞行器气动方面的研究工作主要集中于采用数值模拟或风洞实验,开展可变形飞行器气动布局概念和不同变形模态气动特性研究,而关于连续变形过程中非定常气动特性的研究则很少,几为空白。本文在无粘不可压(Ma=0.2)流场中,数值模拟了儒可夫斯基翼型连续改变厚度、弯度所引起的气动特性变化,分析了不同变形幅度、变形速度以及变形加速度对非定常升力系数的影响情况,这也为以后的三维数值模拟提供了基础。

Study on Unsteady Aerodynamic Characteristics of Airfoils with Continuous Morphing

The advantage of morphing aircraft makes it become the hotspot.Presently the study of aerodynamic problem over morphing aircraft is fastened upon numerical simulation or wind tunnel experiment,which works over steady aerodynamic characteristic of different shape of aircraft.While the reference which studies aerodynamic characteristic of aircraft morphing continuously has not been seen yet.The aerodynamic characteristic changed by continuously morphing thickness and camber is numerical simulated over Joukowsky airfoil at incompressible conditions.The influence of different morphing range,velocity and acceleration on unsteady lift coefficient is analysed on the process of continuously morphing thickness and camber which provides foundation for three-dimensional numerical simulate.