Abstract
Axial-flow-induced vibration has been experimentally investigated with clamped-free cantilevered cylindrical rods confined in a tube and subjected to axial water flow directed from the rod free-end towards the clamped end: a simplified configuration relevant for water-cooled nuclear reactor cores. Non-contact optical techniques have been used to simultaneously detect the rods vibration and the flow field around the vibrating rods free-end. The source of excitation is turbulent buffeting at low flow velocity, while a movement induced excitation component is present at large flow velocities. The rods flow-induced vibration consists of a fuzzy period-1 motion: a periodic (period-1) motion with a chaotic component that increases in relative importance as the flow velocity is increased. The experimental data provided here are particularly suited for numerical fluid-structure model development and benchmarking, as they combine a rich fluid-structure multi-physics interaction with a relatively simple configuration and include both the flow field and the mechanical response of the vibrating rods.
| Original language | English |
|---|---|
| Pages (from-to) | 102-118 |
| Number of pages | 17 |
| Journal | Nuclear Engineering and Design |
| Volume | 338 |
| DOIs | |
| State | Published - Nov 2018 |
| Externally published | Yes |
Keywords
- Axial flow
- Benchmark experiments
- Cantilever rod
- Flow-induced vibration
- Fluid-structure interaction
- Nuclear reactor