Numerical simulation of the flow field and structural improvement in the nozzle atomization

HUANG Chuilang1, LIU Xinxu2, ZHANG Zhendong1, CHEN Zhong1

(1.School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
2.Shanghai AINAIJI Science and Technology Co.,Ltd., Shanghai 200080, China)

Abstract: Aiming at the problem that the atomization performance is influented by air nozzle shape, the atomization performance of air nozzle was studied with different fan structure parameters, the general pattern could be summarized between the structure parameters of air nozzle and the change of atomization flow field, a kind of air nozzle structure was proposed. Based on Reynolds NS equations and standard Kε turbulent mode as well as standard wall function method, the atomization flow field of air nozzle was simulated with different fan cone angle and fan hole number by using CFD method, and the atomization performance was analyzed by the change of fan parameters in air nozzle. Besides, the better structure models were verified by the bench tests of spray gun. The results indicate that the experimental data is similar that of simulation, and the atomization performance is actually improved which provide a certain reference for optimizing the air nozzle structure.

Key words: air nozzle; fan hole; fan cong angle; numerical simulation; parameter optimization