Analysis of the Flow Field and Impact Force in High-Pressure Water Descaling

This study aims to improve the performances of the high-pressure water descaling technology used in steel hot rolling processes. In particular, a 2050 mm hot rolling line is considered, and the problem is investigated by means of a fluid-structure interaction (FSI) method by which the descaling effect produced by rolling coils with different section sizes is examined. Assuming a flat fan-shaped nozzle at the entrance of the R1R2 roughing mill, the out-flow field characteristics and the velocity distribution curve on the strike line (at a target distance of 30-120 mm) are determined. It is found that the velocity in the center region of the water jet with different target distances is higher than that in the boundary region. As the target distance increases, the velocity of the water jet in the central region decreases. Through comparison with experimental results, it is shown that the simulation model can accu-rately predict the impact position of the high-pressure water on the impact plate, thereby providing a computa-tional scheme that can be used to optimize the nozzle space layout and improve the slabs' descent effect for different rolling specifications.