波纹翅片的制作、气动测量及性能评价

ty10086 提交于 周三, 08/25/2021 - 16:00
文章英文标题
Fabrication, Aerodynamic Measurement and Performance Evaluation of Corrugated Flapping Wings
正文
本文介绍了扑翼微型飞行器( FWMAV )上波纹翅图案的制作、气动测量和性能评价。昆虫翅膀以其波纹状的拓扑特性,在扑动和悬停过程中赋予自身较高的承载能力。认为昆虫翅膀上适当的波纹结构增强了气动性能。提出并实现了一种利用聚二甲基硅氧烷( PDMS )模压和聚对苯二甲酸酯涂层制备24 cm跨度FWMAV的新工艺。制作包括三维( 3D )打印制作的主机翼模板,用于机翼模板复制的PDMS成型工艺,以及最终获得波纹机翼的Parylene涂层。选择Parylene - C厚度为40 μ m。为了比较两种扑翼的气动性能,在FWMAV上分别实现了两种扑翼:一种是采用聚对苯二甲酸乙二醇酯( PET )平板膜(无波纹)扑翼。然后,升力信号由风洞中的载荷单元测量。针对扑翼的气动性能,通过大量的风洞实验数据,对FWMAV的巡航条件和巡航升力进行了系统的性能评估。波纹型涤纶扑翼升力系数达到7.8 ~ 8.0,PET平板膜翅至今无法实现。
文章内容(英文)
This paper deals with the fabrication, aerodynamic measurement, and performance evaluation of the corrugated wing patterns on a flapping wing micro air vehicle (FWMAV). The corrugated wing pattern is generally seen in insects. Insect wings with their corrugated topological features give themselves high load-bearing capacity during flapping and hovering. It is believed that appropriate corrugated structures on insect wings enhance aerodynamic performance. A new fabrication process using polydimethylsiloxane (PDMS)-molding and parylene coating was proposed and implemented for a 24 cm-span FWMAV, which is composed of corrugated wing inspired by the dragonfly wing. The fabrication includes the master wing template made by three-dimensional (3D) printing, the PDMS molding process for wing template duplication, and the final parylene coating to obtain corrugated wings. The parylene-C thickness was selected as 40 μm. For comparing the aerodynamic performance, two types of flapping wings were implemented on the FWMAVs: first with a pair of parylene corrugated wings and the other with polyethylene terephthalate (PET) flat membrane (without corrugation) wings. The lift signal was then measured by the load cell in a wind tunnel. Regarding the aerodynamic performance of flapping wings, a systematic performance estimation of finding the cruising conditions and the cruising lift for FWMAVs was investigated through the massive wind tunnel data. The parylene flapping wings with corrugation attained lift coefficients of 7.8-8.0, which the PET flat membrane wing cannot achieve so far.
来源出处
Journal|[J]Journal of Aeronautics, Astronautics and AviationVolume 53, Issue 1. 2021. PP 83-93
DOI
https://doi.org/10.6125/JOAAA.202103_53(1).07

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备注说明:

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