LAUSR

In this paper, the near-field injection characteristics of fuel injection nozzles are studied based on the roughness of the hole wall. Using FLUENT’s VOF multiphase flow model and realizable k-e turbulence mode to simulate the process of fuel injection from the nozzle under different hole wall roughness. Based on the two parameters of penetration distance and atomization cone angle, the results of fuel injection under different hole wall roughness are analyzed, and the fuel injection verification experiment is carried out through the injection nozzle hole processed by picosecond laser. The results show that the simulation results are consistent with the actual results, and the influence of roughness on the penetration distance and the atomization cone angle is verified. The specific effect is that the increase of the wall surface roughness of the injection hole will lead to the decrease of the penetration distance of the fuel injection and the increase of the atomization cone angle.