| Issue |
MATEC Web Conf.
Volume 412, 2025
42nd. Annual Conference “Meeting of the Departments of Fluid Mechanics and Thermomechanics” in the connection with XXIV. International Scientific Conference “The Application of Experimental and Numerical Methods in Fluid Mechanics and Energy” (42nd. MDFMT & XXIV. AENMMTE-2025)
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| Article Number | 05003 | |
| Number of page(s) | 8 | |
| Section | Visualization of Flow | |
| DOI | https://doi.org/10.1051/matecconf/202541205003 | |
| Published online | 05 September 2025 | |
Flow through a hexagonal mixing grid with parabolic vanes measured experimentally by PIV in two planes at distances 1 and 5 × the maximum inscribed diameter D at Reynolds number based on D of 1.5⋅104, 3.1⋅104 and 6.2⋅104
University of West Bohemia in Pilsen, Faculty of Mechanical Engineering, Department of Power System Engineering, Univerzitní 22, 306 14 Pilsen, Czech Republic
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract
Particle Image Velocimetry (PIV) method is used to measure the flow through a prototype mixing grid for nuclear reactor. In this preliminary experiment, there are no fuel rods, the grid is empty. We observe the pattern of jets and wakes, which is deformed by the transient flow introduced by the mixing vanes. The flow displays relatively low dependence on Reynolds number and high dependence on the downstream distance. In the contribution, there are shown the spatial maps of mean velocity, turbulence intensity and turbulence flatness.
© The Authors, published by EDP Sciences, 2025
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