In this paper, the internal flow field and external spray characteristics of the spray gun were simulated and analyzed by establishing a coupling model of the gas-liquid two-phase flow of the spray gun. The spray part...In this paper, the internal flow field and external spray characteristics of the spray gun were simulated and analyzed by establishing a coupling model of the gas-liquid two-phase flow of the spray gun. The spray particle size and cone angle under different gas path pressures were mainly studied. The calculation results showed that the spray particle size distribution had a large span, but the overall spray particle size was small. The liquid flow and the air pressure had a little influence on the spray cone angle. The spray SMD was tested by a three-dimensional particle dynamic analyzer (PDA), and the spray cone angle was photographed with a high-speed camera. The test data was basically consistent with the simulation results. The experimental results showed that the model can accurately simulate the internal flow field of the spray gun and the atomization process of urea. It can be used to analyze the characteristics of urea spray and provide a theoretical basis for the optimal design of urea spray gun.展开更多
文摘In this paper, the internal flow field and external spray characteristics of the spray gun were simulated and analyzed by establishing a coupling model of the gas-liquid two-phase flow of the spray gun. The spray particle size and cone angle under different gas path pressures were mainly studied. The calculation results showed that the spray particle size distribution had a large span, but the overall spray particle size was small. The liquid flow and the air pressure had a little influence on the spray cone angle. The spray SMD was tested by a three-dimensional particle dynamic analyzer (PDA), and the spray cone angle was photographed with a high-speed camera. The test data was basically consistent with the simulation results. The experimental results showed that the model can accurately simulate the internal flow field of the spray gun and the atomization process of urea. It can be used to analyze the characteristics of urea spray and provide a theoretical basis for the optimal design of urea spray gun.
