dc.contributor.advisor	Novosád Jan, Ing. Ph.D. :64359	cs
dc.contributor.author	Kwalombota, Kalaluka	cs
dc.contributor.referee	Procházka Pavel, Ing. PhD. :68843	cs
dc.date.accessioned	2025-07-15T06:13:27Z
dc.date.available	2025-07-15T06:13:27Z
dc.date.committed	30.4.2026	cs
dc.date.defense	18.6.2025	cs
dc.date.issued	2025-06-18	cs
dc.date.submitted	1.11.2024	cs
dc.description.abstract	In recent years, there has been growing interest in understanding how structural vibrations affect the flow around bluff bodies, especially given their relevance in areas such as energy harvesting and flow control. One of the most effective tools for capturing such complex flow behaviours is Particle Image Velocimetry (PIV), which provides detailed insight into velocity fields and wake structures. However, the precise influence of body oscillation on wake dynamics, vortex shedding, and flow symmetry still requires deeper investigation. This study explores the flow field around a vibrating cylinder using a stereoscopic PIV system in a controlled wind tunnel environment. Measurements were taken at different freestream velocities, comparing the flow characteristics of both fixed and oscillating configurations. Supporting this, high-speed video analysis was used to track the vibration response of the cylinder and extract frequency and amplitude data. The results show that when the cylinder is allowed to oscillate, the wake becomes noticeably broader and more asymmetric compared to the fixed case. Vortex shedding loses its regularity, and the velocity profiles recover more slowly downstream. A clear lock-in region was observed between 10 and 12 m/s, where the flow frequency matched the structural vibration, leading to a sharp rise in amplitude. These findings are consistent with classical flow-induced vibration theory and highlight how structural motion can reshape aerodynamic behaviour. Overall, this work offers valuable insight into the interaction between vibrating structures and surrounding flow, with potential applications in vibration control, sensing, and renewable energy systems.	cs
dc.description.abstract	In recent years, there has been growing interest in understanding how structural vibrations affect the flow around bluff bodies, especially given their relevance in areas such as energy harvesting and flow control. One of the most effective tools for capturing such complex flow behaviours is Particle Image Velocimetry (PIV), which provides detailed insight into velocity fields and wake structures. However, the precise influence of body oscillation on wake dynamics, vortex shedding, and flow symmetry still requires deeper investigation. This study explores the flow field around a vibrating cylinder using a stereoscopic PIV system in a controlled wind tunnel environment. Measurements were taken at different freestream velocities, comparing the flow characteristics of both fixed and oscillating configurations. Supporting this, high-speed video analysis was used to track the vibration response of the cylinder and extract frequency and amplitude data. The results show that when the cylinder is allowed to oscillate, the wake becomes noticeably broader and more asymmetric compared to the fixed case. Vortex shedding loses its regularity, and the velocity profiles recover more slowly downstream. A clear lock-in region was observed between 10 and 12 m/s, where the flow frequency matched the structural vibration, leading to a sharp rise in amplitude. These findings are consistent with classical flow-induced vibration theory and highlight how structural motion can reshape aerodynamic behaviour. Overall, this work offers valuable insight into the interaction between vibrating structures and surrounding flow, with potential applications in vibration control, sensing, and renewable energy systems.	en
dc.format	54 p. (87 247)	cs
dc.identifier.uri	https://dspace.tul.cz/handle/15240/177701
dc.language.iso	AN	cs
dc.subject	Flow-induced vibration	cs
dc.subject	bluff body	cs
dc.subject	vortex shedding	cs
dc.subject	wake flow	cs
dc.subject	lock-in	cs
dc.subject	circular cylinder	cs
dc.subject	Particle Image Velocimetry	cs
dc.subject	stereoscopic PIV	cs
dc.subject	wind tunnel	cs
dc.subject	fluid-structure interaction	cs
dc.title	Experimental investigation of flow fields around a vibrating body using PIV	cs
dc.title	Experimental investigation of flow fields around a vibrating body using PIV	en
dc.type	diplomová práce	cs
local.degree.abbreviation	Navazující	cs
local.identifier.author	S23000277	cs
local.identifier.stag	47955	cs

Experimental investigation of flow fields around a vibrating body using PIV

Files

Original bundle

Collections