{"title":"用椭圆形圆柱体提高刚毛机翼的空气动力性能。","authors":"Wanqiu Zhang, Daxing Liang, Dongwen Tan, Yaochen Mei, Xinping Zhou","doi":"10.1088/1748-3190/ad2115","DOIUrl":null,"url":null,"abstract":"<p><p>Enhancing the aerodynamic performance of bristled wings is an important topic for small flying robotics. This paper numerically investigates this situation at very low Reynolds numbers by using elliptic cylinders as the bristles instead of circular cylinders. Optimal configuration of the bristled wing with five elliptic cylinders is obtained, which corresponds to the maximum lift. The results show that, compared with the case of circular cylindrical bristles, the aerodynamic performance of the elliptical bristles can be enhanced effectively. The enhancement can be more significant as the aspect ratio of the ellipses increases and the gap width decreases. The bristled wing generates more lift compared to a flat-plate wing with a length five times that of the major axis of an ellipse. For the cases that the attack angle<i>α</i>for the whole wing is equal to those for the elliptical bristles<i>θ</i>, the optimal attack angle for ellipses maximizing the total lift force of the five-bristle model is between 40° and 45°. For<i>α ≠</i><i>θ</i>with the Reynold number<i>Re</i>≪ 0.1, the optimal ellipse attack angle is between 40° and 45°. For<i>α ≠</i><i>θ</i>with<i>Re</i>∼ 1, the optimal ellipse attack angle deviates heavier from the range between 40° and 45° at some<i>α</i>values and reaches approximately 32° at<i>α</i>= 20°. This paper can lay a foundation for optimal design of small flying robotics and enhancement of flow through porous structures in future.</p>","PeriodicalId":55377,"journal":{"name":"Bioinspiration & Biomimetics","volume":null,"pages":null},"PeriodicalIF":3.1000,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhancement of aerodynamic performance of a bristled wing by elliptic cylinders.\",\"authors\":\"Wanqiu Zhang, Daxing Liang, Dongwen Tan, Yaochen Mei, Xinping Zhou\",\"doi\":\"10.1088/1748-3190/ad2115\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Enhancing the aerodynamic performance of bristled wings is an important topic for small flying robotics. This paper numerically investigates this situation at very low Reynolds numbers by using elliptic cylinders as the bristles instead of circular cylinders. Optimal configuration of the bristled wing with five elliptic cylinders is obtained, which corresponds to the maximum lift. The results show that, compared with the case of circular cylindrical bristles, the aerodynamic performance of the elliptical bristles can be enhanced effectively. The enhancement can be more significant as the aspect ratio of the ellipses increases and the gap width decreases. The bristled wing generates more lift compared to a flat-plate wing with a length five times that of the major axis of an ellipse. For the cases that the attack angle<i>α</i>for the whole wing is equal to those for the elliptical bristles<i>θ</i>, the optimal attack angle for ellipses maximizing the total lift force of the five-bristle model is between 40° and 45°. For<i>α ≠</i><i>θ</i>with the Reynold number<i>Re</i>≪ 0.1, the optimal ellipse attack angle is between 40° and 45°. For<i>α ≠</i><i>θ</i>with<i>Re</i>∼ 1, the optimal ellipse attack angle deviates heavier from the range between 40° and 45° at some<i>α</i>values and reaches approximately 32° at<i>α</i>= 20°. This paper can lay a foundation for optimal design of small flying robotics and enhancement of flow through porous structures in future.</p>\",\"PeriodicalId\":55377,\"journal\":{\"name\":\"Bioinspiration & Biomimetics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2024-02-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Bioinspiration & Biomimetics\",\"FirstCategoryId\":\"94\",\"ListUrlMain\":\"https://doi.org/10.1088/1748-3190/ad2115\",\"RegionNum\":3,\"RegionCategory\":\"计算机科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bioinspiration & Biomimetics","FirstCategoryId":"94","ListUrlMain":"https://doi.org/10.1088/1748-3190/ad2115","RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MULTIDISCIPLINARY","Score":null,"Total":0}
Enhancement of aerodynamic performance of a bristled wing by elliptic cylinders.
Enhancing the aerodynamic performance of bristled wings is an important topic for small flying robotics. This paper numerically investigates this situation at very low Reynolds numbers by using elliptic cylinders as the bristles instead of circular cylinders. Optimal configuration of the bristled wing with five elliptic cylinders is obtained, which corresponds to the maximum lift. The results show that, compared with the case of circular cylindrical bristles, the aerodynamic performance of the elliptical bristles can be enhanced effectively. The enhancement can be more significant as the aspect ratio of the ellipses increases and the gap width decreases. The bristled wing generates more lift compared to a flat-plate wing with a length five times that of the major axis of an ellipse. For the cases that the attack angleαfor the whole wing is equal to those for the elliptical bristlesθ, the optimal attack angle for ellipses maximizing the total lift force of the five-bristle model is between 40° and 45°. Forα ≠θwith the Reynold numberRe≪ 0.1, the optimal ellipse attack angle is between 40° and 45°. Forα ≠θwithRe∼ 1, the optimal ellipse attack angle deviates heavier from the range between 40° and 45° at someαvalues and reaches approximately 32° atα= 20°. This paper can lay a foundation for optimal design of small flying robotics and enhancement of flow through porous structures in future.
期刊介绍:
Bioinspiration & Biomimetics publishes research involving the study and distillation of principles and functions found in biological systems that have been developed through evolution, and application of this knowledge to produce novel and exciting basic technologies and new approaches to solving scientific problems. It provides a forum for interdisciplinary research which acts as a pipeline, facilitating the two-way flow of ideas and understanding between the extensive bodies of knowledge of the different disciplines. It has two principal aims: to draw on biology to enrich engineering and to draw from engineering to enrich biology.
The journal aims to include input from across all intersecting areas of both fields. In biology, this would include work in all fields from physiology to ecology, with either zoological or botanical focus. In engineering, this would include both design and practical application of biomimetic or bioinspired devices and systems. Typical areas of interest include:
Systems, designs and structure
Communication and navigation
Cooperative behaviour
Self-organizing biological systems
Self-healing and self-assembly
Aerial locomotion and aerospace applications of biomimetics
Biomorphic surface and subsurface systems
Marine dynamics: swimming and underwater dynamics
Applications of novel materials
Biomechanics; including movement, locomotion, fluidics
Cellular behaviour
Sensors and senses
Biomimetic or bioinformed approaches to geological exploration.