CAREER: Ultra Quiet Aircraft Propulsion Inspired by the Unique Plumage of the Owl

职业：受猫头鹰独特羽毛启发的超静音飞机推进系统

• 批准号: 1554196
• 负责人: Anupam Sharma
• 金额: $ 50万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-04-01 至 2022-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1554196&HistoricalAwards=false
• 关键词: CAREER; Ultra; Quiet; Aircraft; Propulsion

PI: Sharma, AnupamProposal Number: 1554196 The goal of this CAREER is to investigate the unsteady flow around the flapping wings of an owl and to uncover the relationship between fluid dynamics phenomena and the unique configuration of the owl wings that is responsible for the silent flight of owls. The results of this research could have an impact on the design of silent air vehicles with application in national defense, in commerce and in transportation (an area of national need). It is proposed to use high fidelity computations to understand the effects of the wing microstructure and of the way the wing flaps on sound generation. The specific research objectives are to: (1) develop numerical methods to identify the true sources of aerodynamically generated sound, (2) investigate the unique feather adaptations (the "hush kit") of the owl that enable its silent flight, and (3) adapt the owl hush kit to develop ultra-quiet Unmanned Aerial Vehicles and jet engines. In addition to graduate and undergraduate student training, there are plans to develop a new outreach program with the local museum (the Science Center at Iowa) and to connect the students with the industry.

本职业的目标是研究猫头鹰扇动翅膀周围的非定常流动，并揭示流体动力学现象与猫头鹰翅膀的独特结构之间的关系，这种结构是猫头鹰无声飞行的原因。这项研究的结果可能对无声飞行器的设计产生影响，并应用于国防、商业和运输（国家需要的领域）。提出了利用高保真度计算来了解机翼微观结构和机翼襟翼方式对声音产生的影响。具体的研究目标是：(1)发展数值方法来识别空气动力产生的声音的真正来源；(2)研究猫头鹰独特的羽毛适应性（“hush kit”），使其能够静音飞行；(3)调整猫头鹰的hush套件来开发超静音无人机和喷气发动机。除了研究生和本科生的培训外，还计划与当地博物馆（爱荷华州科学中心）开发一个新的外展项目，并将学生与行业联系起来。

项目成果

A vorticity-based criterion to characterise leading edge dynamic stall onset

基于涡度的标准来表征前缘动态失速开始

• DOI: 10.1017/jfm.2021.1149
• 发表时间: 2022
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: Sudharsan, Sarasija;Ganapathysubramanian, B.;Sharma, A.
• 通讯作者: Sharma, A.

Evaluating Dynamic Stall Onset Criteria for Mixed and Trailing-Edge Stall

评估混合和后缘失速的动态失速开始标准

• DOI: 10.2514/6.2022-1983
• 发表时间: 2022
• 期刊: 2022 AIAA SciTech Meeting
• 作者: Sudharsan, Sarasija;Narsipur, Shreyas;Sharma, Anupam
• 通讯作者: Sharma, Anupam

Numerical investigation of the effect of airfoil thickness on onset of dynamic stall

• DOI: 10.1017/jfm.2019.235
• 发表时间: 2017-04
• 期刊: Journal of Fluid Mechanics
• 影响因子: 3.7
• 作者: Anupam Sharma;M. Visbal

Exploring Various Techniques to Characterize Leading-Edge Dynamic Stall Onset

探索各种技术来表征前沿动态失速开始

• DOI: 10.2514/6.2021-2520
• 发表时间: 2021
• 期刊: 2021 AIAA Aviation Meeting
• 作者: Sudharsan, Sarasija;Sharma, Anupam
• 通讯作者: Sharma, Anupam

Numerical analysis of aerodynamic noise mitigation via leading edge serrations for a rod–airfoil configuration

• DOI: 10.1177/1475472x16672322
• 发表时间: 2016-09
• 期刊: International Journal of Aeroacoustics
• 影响因子: 1
• 作者: B. Agrawal;Anupam Sharma