摘要
变前掠翼飞行器是一种典型的变体飞机,机翼变掠过程中翼型为可变翼型,其气动特性对变前掠翼飞行器的飞行性能有着巨大的影响,它也是飞行器气动布局设计首先要解决的难点问题之一。为了探究可变翼型的非定常气动特性,首先建立了10个不同前掠角下的可变翼型模型,然后采用S-A湍流模型并经过CFD仿真计算,最后分析了可变翼型非定常气动参数随前掠角和迎角等的变化规律。结果表明,翼型的升力、阻力和力矩系数在小迎角时随前掠角变大而略有减小,在中大迎角时随前掠角增大而增大,这些气动特性变化规律可为变体飞行器的气动布局设计和动力学分析提供有益的参考。
Variable forward - swept wing （VFSW） aircraft is a kind of typical Morphing Aircraft, with the change of forward - swept angle, the airfoil of variable forward - swept wing will also be changed, and its aerodynamic characteristics have a very important influence on flight performance, so it becomes one of the difficult problems in aerodynamic configuration research. In order to explore unsteady aerodynamic characteristics of variable airfoil, this paper firstly built ten airfoil models under different forward - swept angle, secondly uses S - A turbulence model for simula- tion computation, and the impacts on airfoil unsteady aerodynamic characteristics from angle of attack, mach number and forward - swept angle were analyzed. The results show that, the lift coefficient, resistance coefficient and mo- ment coefficient can slightly decrease with the rise of forward - swept angle, but while flying in a high angle of at- tack, these coefficients can increase with the rise of forward - swept angle. The results can also provide some references for further research of aerodynamic configuration and dynamics of variable forward - swept wing aircraft.
出处
《计算机仿真》
CSCD
北大核心
2015年第10期54-58,共5页
Computer Simulation
关键词
变前掠翼
可变翼型
气动特性
非定常
Variable forward - swept wing
Variable Airfoil
Aerodynamic Characteristics
Unsteady
