Numerical Study on Abrasive Flow of the Fuel Spray Nozzle Based on RNG k-ε Model

Abstract

In view of the current problems that it is difficult to polish small size and complex curved surface, a processing method based on solid-liquid two-phase abrasive flow is proposed. In order to verify the rationality and practicability of the processing method, the numerical simulation is carried out for the processing of solid-liquid two-phase abrasive flow. By using the RNG k-ε turbulence model and the Mixture model, the fuel spray nozzle is taken as the research object. The dynamic pressure, the turbulent dissipation rate and turbulent kinetic energy at the nozzle hole are analyzed and compared. The simulation results show that with the increase of inlet velocity, dynamic pressure, fluid velocity and turbulent kinetic energy at nozzle orifice increase at some extent, which tells that the effect of solid-liquid two-phase flow on the pore wall is stronger, the more intense the friction between the fluid and the wall, the better the polishing effect, thus the effectiveness of the abrasive flow processing was concluded and providing theoretical support for the fluid processing of complex components.