| Swirl nozzle as a common structure of the nozzle,because of its relative to other single-fluid nozzle has a simple structure,less energy consumption,better atomization and other characteristics,in environmental protection,chemical and fire and other fields are widely Applications.In this paper,a nozzle is used to modify the internal structure of the nozzle.The atomization characteristics of the nozzle are simulated and analyzed by laser Doppler phase analyzer(PDPA)and Fluent software of computational fluid dynamics(CFD).The main research contents are as follows:The atomization characteristics of the original nozzle were tested by the laser Doppler phase analyzer(PDPA).The fogging characteristics of the original nozzle mainly included the fog angle,range and droplet diameter.The experimental program mainly includes the measurement of atomization characteristics,the physicochemical properties of different cross-sections and the atomization characteristics of different positions on the same cross-section.The original nozzle was measured by the measuring microscope and Olympus laser confocal microscope.The original nozzle was modeled by SolidWorks 3D software.The nozzle flow field was meshed by Gambit software.Finally,the steady state and transient atomization of the swirl nozzle are numerically simulated by Fluent simulation software.The simulation and experimental data of the swirl nozzle are compared and analyzed to determine the correct simulation method.Based on the correct simulation method,three kinds of structural parameters which influence the atomization effect of the swirl nozzle are analyzed by the orthogonal test optimization method,and the optimum nozzle structure combination is selected,The optimized nozzle is simulated by Fluent,and the simulation results are compared with those of the original nozzle.By comparing the results,the correctness of the optimization scheme is determined. |
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