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Simulation and Experimental Study on Spray Characteristics of Gas-Assisted Urea Spray Gun

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Document pages: 12 pages

Abstract: In this paper, the internal flow field andexternal spray characteristics of the spray gun were simulated and analyzed byestablishing a coupling model of the gas-liquid two-phase flow of the spraygun. The spray particle size and cone angle under different gas path pressureswere mainly studied. The calculation results showed that the spray particlesize distribution had a large span, but the overall spray particle size wassmall. The liquid flow and the air pressure had a little influence on the spraycone angle. The spray SMD was tested by a three-dimensional particle dynamicanalyzer (PDA), and the spray cone angle was photographed with a high-speedcamera. The test data was basically consistent with the simulation results. Theexperimental results showed that the model can accurately simulate the internalflow field of the spray gun and the atomization process of urea. It can be usedto analyze the characteristics of urea spray and provide a theoretical basisfor the optimal design of urea spray gun.

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