UNS: Collaborative Research: Role of Bristled Wings for Flying and Swimming at Low Reynolds Numbers

UNS：合作研究：鬃毛翅膀在低雷诺数下飞行和游泳的作用

• 批准号: 1512071
• 负责人: Arvind Santhanakrishnan
• 金额: $ 23.62万
• 依托单位: Oklahoma State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-07-01 至 2020-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1512071&HistoricalAwards=false
• 关键词: UNS; Collaborative; Research; Role; Bristled

1512071(Santhanakrishnan) & 1511427(Miller)The focus of the proposed project is to explore the fluid dynamic principles that enable small insects to generate lift and produce thrust. When the wings of small insects clap together during the flapping motion and then fling apart, there is the expectation that flight would not be efficient, but it is. Resolving this paradox can have a significant scientific and technological impact, because we could also design machinery that takes advantage of such phenomena like small robotic vehicles that move across fluid-air interfaces.The proposal is focused on the understanding of the phenomena involved when bristled wings, like those of small insects generate lift. Although the aerodynamic principles of insect flight at the scale of fruit flies and above are reasonably well understood, the fluid dynamic mechanisms that enable very tiny insects to generate lift or thrust remain unclear. When the wings clap together at the end of the upstroke of the flapping motion and fling apart at the start of the downstroke, there are novel phenomena that take place. The fundamental investigation in this work will be focused on a particularly intriguing paradox: why is there a noted biological preference in almost all tiny insects to employ interacting bristled wings under highly viscous conditions that would require large forces to peel the wings apart? It is proposed to develop 3D poroelastic models to study locomotion using bristled appendages. Two types of insects will be examined (thrips and parasitoid wasps), which are capable of flying in air and swimming in water. The experiments in this proposal will also use robotic wing-wing interaction platforms with dynamically scaled bristled wing models informed by high-speed videos of tiny insects. Wing design and kinematics for flapping propulsion at low Re will be identified through numerical simulations of experimentally validated poroelastic wing models implemented in an immersed boundary method framework. Graduate and undergraduate student involvement in the research is proposed. Minority student participation will be pursued through the Louis Stokes Alliances for Minority Participation (LSAMP) program at both institutions. Outreach activities for high school students and teachers participating in the Oklahoma State University National Lab Day annual event are also described.

1512071（Santhanakrishnan）和1511427（Miller）该项目的重点是探索使小昆虫能够产生升力并产生推力的流体动态原理。当小昆虫的翅膀在拍打运动过程中同时拍手，然后拆开时，人们期望飞行不会有效，但这是如此。解决这一悖论可以产生重大的科学和技术影响，因为我们还可以设计利用这种现象的机械，例如在流体空气界面上移动的小型机器人车辆。该提案集中在对毛发时现象的理解上，就像毛发般的翅膀一样，例如小昆虫产生的升降。尽管在水果蝇及以上的昆虫飞行中的空气动力学原理是相当理解的，但流体动态机制使非常微小的昆虫能够产生升力或推力。当翅膀在上行动作的上风的尽头，并在下沉的开始时分开时，发生了一些新颖的现象。这项工作的基本调查将集中在一个特别有趣的悖论上：为什么几乎所有微小昆虫在高度粘性的条件下都有著名的生物学偏好来采用相互作用的毛翅膀，这需要大力量将大力剥离翅膀分开？提议开发3D毛弹性模型，以使用毛发的附属物研究运动。将检查两种类型的昆虫（蓟马和寄生的黄蜂），它们能够在空气中飞行并在水中游泳。该提案中的实验还将使用机器人翼翼相互作用平台，并具有动态缩放的毛翼模型，该模型由小型昆虫的高速视频带来。通过在浸入边界方法框架中实施的实验验证的孔弹翼模型的数值模拟，将通过数值模拟来识别用于较低RE的翼推力的机翼设计和运动学。提出了研究生和本科生参与研究的参与。将通过路易斯·斯托克斯联盟（Louis Stokes）联盟（LSAKES）参加少数群体的参与（LSAMP）计划。还描述了参加俄克拉荷马州立大学国家实验室日活动的高中生和老师的外展活动。

项目成果

Flow Structure and Force Generation on Flapping Wings at Low Reynolds Numbers Relevant to the Flight of Tiny Insects

与微小昆虫飞行相关的低雷诺数扑翼的流动结构和力产生

• DOI: 10.3390/fluids3030045
• 发表时间: 2018
• 期刊: Fluids
• 影响因子: 1.9
• 作者: Santhanakrishnan, Arvind;Jones, Shannon;Dickson, William;Peek, Martin;Kasoju, Vishwa;Dickinson, Michael;Miller, Laura
• 通讯作者: Miller, Laura

Three-Dimensional Low Reynolds Number Flows near Biological Filtering and Protective Layers

生物过滤和保护层附近的三维低雷诺数流动

• DOI: 10.3390/fluids2040062
• 发表时间: 2017
• 期刊: Fluids
• 影响因子: 1.9
• 作者: Strickland, Christopher;Miller, Laura;Santhanakrishnan, Arvind;Hamlet, Christina;Battista, Nicholas;Pasour, Virginia
• 通讯作者: Pasour, Virginia

Aerodynamic interaction of bristled wing pairs in fling

刚毛翼对在飞行中的空气动力相互作用

• DOI: 10.1063/5.0036018
• 发表时间: 2021-03-01
• 期刊: PHYSICS OF FLUIDS
• 影响因子: 4.6
• 作者: Kasoju, Vishwa T.;Santhanakrishnan, Arvind
• 通讯作者: Santhanakrishnan, Arvind

Pausing after clap reduces power required to fling wings apart at low Reynolds number

拍手后暂停可降低在低雷诺数条件下机翼扇开所需的功率

• DOI: 10.1088/1748-3190/ac050a
• 发表时间: 2021-09-01
• 期刊: BIOINSPIRATION & BIOMIMETICS
• 影响因子: 3.4
• 作者: Kasoju, Vishwa T.;Santhanakrishnan, Arvind
• 通讯作者: Santhanakrishnan, Arvind

Aerodynamic effects of varying solid surface area of bristled wings performing clap and fling

• DOI: 10.1088/1748-3190/ab1a00
• 发表时间: 2019-07-01
• 期刊: BIOINSPIRATION & BIOMIMETICS
• 影响因子: 3.4
• 作者: Ford, Mitchell P.;Kasoju, Vishwa T.;Santhanakrishnan, Arvind
• 通讯作者: Santhanakrishnan, Arvind