What type of study is this?

September 10, 2025Open Access

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

Key Points

The flow shows low dependence on Reynolds number while demonstrating significant changes depending on downstream distance.
Spatial maps of mean velocity, turbulence intensity, and turbulence flatness have been presented, contributing to flow understanding.
Using particle image velocimetry, flow patterns through the mixing grid were analyzed at various distances from the grid.
Experimental findings underscore the impact of mixing vanes on the characteristics of the flow and its resultant jets and wakes.

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.

Read Full Paperexternally

اسأل الذكاء الاصطناعي

Bookmark

View Full Paper