Numerical simulation of jet impact process with different jet velocities in a negative pressure ambient

Abstract

The effect of jet velocity on jet impingement process was of great importance. However, the process of jet impingement and fragmentation is highly complex and involves various physical and thermal phenomena. Therefore, our current work primarily focuses on using computational fluid dynamics (CFD) method to investigate the effect of jet velocity on the characteristics of jet impingement in a negative pressure ambient. The Realizable k-ε model is employed to simulate the turbulent flow process, and an improved Mixture model is used to describe the distribution behavior of the gas-liquid phases. The characteristics of flow field, pressure distribution, velocity distribution, turbulence kinetic energy distribution and vortex behavior were analyzed under different jet velocities at a negative pressure of 31.6 kPa. The results indicate that as the jet velocity increases, the core of jet impingement pressure also increases. The above situation resulted in fragment effect enhancement and an increased number of atomized droplets. These findings provide a theoretical basis for further research on the jet impingement-negative pressure deamination reactor (JI-NPDR).