Undergraduate Research Accomplishments Accomplishments: OUR Grantee: Owl-inspired Experimental Study on Flow-induced Vibration Suppression with Aerospace Applications

In today’s industries, turbulent fluctuation causes flow induced noise that has been a major contribution to noise generation of modern structures. Many aeronautical and turbine application are rapidly developing to ensure noise reduction to better understand and control the acoustic of noise and structural vibration. In Abdul Raffae's research Fluid-Structure Interactions (FSI) is used to study the deformation or oscillation (Flow-Induced Vibration) of the structure that will go through fatigue failure in long term. In this proposed work, an owl wings went through detailed experimental campaign to understand the source of this turbulent and find strategies to suppress the FIV in such flexible structures. Three dominant noise-attenuation factors have been identified in owl wings that includes comb-like structure, trailing-edge feathers, and the velvet-like have been identified. To help further this research, in Fall 2021, a flexible circular cylinder with trailing-edge serration was 3D modeled using SOLIDWORKS software cased from silicone material. This was thanks to using the re-circulating water tunnel at Professor Banafsheh Seyedaghazadeh‘s Fluid-Structure Interactions Research Laboratory at UMass-Dartmouth. Subsequently, the effects of serrations geometry, length and aspect ratio were studied using FIV response. Since then Raffae has been working closely with Seyedaghazadeh‘s lab to find solutions to the problem. Raffae is planning to publish the result of this research in a peer-reviewed journal. The Summer 2022 OUR fund provided an opportunity for Raffae to be on campus and be involved in this important research led by Prof. Seyedaghazadeh.