Coolant Hydrodynamics in the Core of PWR Reactors Behind Mixing Spacer Grids with Blades with Two Bending Lines
摘要
The article presents the results of experimental studies of local coolant hydrodynamics in the TBC-Kvadrat reactor downstream of mixing spacer grids with complex-shaped blades with two bending lines. The influence of the geometric parameters of the blades with two bending lines on the distribution of axial and transverse coolant velocities, as well as the formation of vortex structures in its flow, is studied using large-scale experimental models of TBC-Kvadrat fragments. Axial and transverse coolant velocities were measured using pneumometric sensors in regular cells and cells in the guide channel region at several cross sections along the length of the experimental models. The results are presented as maps of the distribution of axial and transverse coolant velocities downstream of the grids for each blade type.