Simulation and Analysis of Parameters Optimization of Ultrasonic Atomizing Nozzle for Mine Atomizing Dust Removal

In order to improve the water jet atomization efficiency of the nozzle used in mine atomization for dust removal, an efficient atomization nozzle combined with self-excited oscillation was designed, and its key parameters were optimized by numerical simulation. The results show that: when the fluid passes through the channel, the velocity presents a laminar distribution characteristic, forming a vortex flow field in the nozzle cavity, and the nozzle velocity reaches more than 100 m/s in the front area near the resonant cavity. When ultrasonic wave and self-excited oscillation wave interact together, the optimal turbulence disturbance effect is achieved in the nozzle, and the better atomization effect is obtained. When the angle becomes smaller, a larger volume of the inner cavity is obtained, which is within the collision wall angle range of 60° to 70°. The vortex forms a filling state on the inner cavity of the nozzle to obtain a more obvious turbulence effect. When the resonator reaches the depth of 3 mm, the optimal injection effect is achieved, and the shock wave is significantly enhanced. With the increase of cavity depth, the turbulent kinetic energy decreases monotonically. At a larger cavity depth, the turbulent kinetic energy is increased and the turbulent effect is stronger.