仿鸟复合振动的扑翼气动分析  

Aerodynamic Computation of Flapping-Wing Simulating Bird Wings

作　　者：曾锐[1] 昂海松[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《南京航空航天大学学报》2003年第1期6-12,共7页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国防预研基金资助项目

摘　　要：根据绿头鸭飞行的录像片断 ,对其平飞时翅膀的扑动模型进行简化 ,提出了一种新的变速 -折叠扑翼扑动模型 ,使之更符合鸟类翅膀的实际扑动规律。通过非定常涡格法的比较计算发现 ,以该新模型规律运动的扑动翼 ,在一个周期内的平均升力系数较原有的匀角速度刚性模型有了显著增加 ,更适用于设计微型扑翼机。本文较详细地计算分析了扑翼平均升力系数随着扑动幅度、俯仰幅度以及扑动频率等各种扑动参数的变化曲线 ,为微型扑翼机的设计提供了一定的参考依据。In early studies of flapping wing, the constant-speed flap model was used most frequently. In fact, the flap model of bird wing is more complex and play a very important role in producing lift. Base on the video clip of Mallard, a new flap model can simulate the bird wing′s flap better. Compared with the calculational results of the new and old flap models, the flapping wing using the new model can produce larger average lift factor than the flapping wing using older one during one cycle. In the foundation of the new model, the variations of different flapping parameters are studied, such as flapping amplitude, pitch amplitude, fold angle and flapping frequency, etc. Finally two effective methods for increasing the flapping amplitude and flapping frequence are provided.

关 键 词：扑翼机 微型飞行器 扑翼模型 非定常涡格法 

分 类 号：V211.15[航空宇航科学与技术—航空宇航推进理论与工程] V211.3