摘要
通过空间曲柄摇杆结构产生的急回特性来实现仿生飞行器扑翼运动.为了探究仿生扑翼飞行器的气动特性的影响因素,采用玻尔兹曼模型的粒子跟踪方法模拟扑动过程中气动特性,基于计算流体力学仿真软件XFlow对不同翼型、翼展、翼平面形状进行仿真分析并探究对升力和推力的影响.结果表明:翼型弯度和翼展的增大能够增加扑翼飞行器的升力系数,推力系数随着弯度的增大而变小;通过综合分析得到翼展长度在2.5倍弦长时,气动特性最佳;不同翼面形状的机翼具有不同的气动性能,相对于机翼后缘几何形状,前缘对气动特性的影响较大.研究结果为扑翼飞行器机翼的系统设计提供了有益的指导.
The bionic flapping wing motion is realized by the rapid return characteristic of space crank and rocker structure.In order to explore the influencing factors of the aerodynamic characteristics of bionic flapping aircraft,the particle tracking method of Boltzmann model is adopted to simulate the aerodynamic characteristics during flapping.Based on the computational fluid dynamics simulation software XFlow,a simulation analysis is carried out for different airfoils,wingspan and wing plane shapes and the influence on lift and thrust is explored.The results show that the lift coefficient of the flapping wing aircraft increases with the rise of the airfoil curvature and wingspan,and the thrust coefficient decreases with the increase of the bending degree.Through the comprehensive analysis,it is found that when the wingspan length is 2.5 times the chord length,the aerodynamic characteristics are the best.Wings with different wing surface shapes have different aerodynamic characteristics.Compared with the trailing edge geometry,the leading edge has a greater impact on the aerodynamic characteristics.
作者
张志君
陈默
杨贺捷
孙霁宇
ZHANG Zhi-jun;CHEN Mo;YANG He-jie;SUN Ji-yu(School of Mechanical and Aerospace Engineering,Jilin University,Changchun 130022,China;College of Physics,Jilin University,Changchun 130012,China;School of Biological and Agricultural Engineering,Jilin University,Changchun 130022,China;Key Laboratory of Biomimetic Engineering,Ministry of Education,Jilin University,Changchun 130022,China)
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第6期821-828,共8页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(31970454).
关键词
仿生
扑翼飞行器
XFlow
机翼形状
气动特性
bionic
flapping wing aircraft
XFlow
wing shape
aerodynamic characteristics
