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

PI：Sharma，Anupam 提案编号：1554196 本职业的目标是研究猫头鹰扑动翅膀周围的不稳定流动，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，猫头鹰翅膀的独特结构导致猫头鹰无声飞行。 这项研究的结果可能会对静音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）。建议使用高保真度计算来了解机翼微观结构和机翼拍动方式对声音产生的影响。 具体研究目标是：(1) 开发数值方法来识别空气动力学产生的声音的真正来源，(2) 研究猫头鹰独特的羽毛适应性（“静音套件”），以实现其无声飞行，以及 (3) 采用猫头鹰静音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培训外，还计划与当地博物馆（爱荷华州科学中心）合作开发新的外展计划，并将学生与行业联系起来。

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.