Abstract
The drying system plays an important role in printing speed and energy consumption of gravure printing machine. Nozzle is a factor which decides heated air distribution in drying system finally. This research makes a model for the structure of nozzle and takes a numerical simulation analysis of heated air field with hydrodynamic theory. The defect of structure is found through the distribution of velocity, temperature and trajectories. A crosswind landing area is added around outlet area of nozzle. In this study, it is evaluated that the distribution of the wind field. It is found that the velocity and pressure of heated air in the vortex area between substrate and nozzle by the cross-wind board can be improved from the simulation results. The study has significance on optimizing the structure of nozzle and improving efficiency of drying system.
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