Abstract: The effects of the atomization gas pressure on the pressure, velocity and temperature fields were analyzed by Fluent, providing theoretical basis for the selection of pressure parameters and feasible research on experimental in spray forming process. The simulation results show that the pressure at nozzle exit approaches the minimum value of 1.16×105 Pa when the gas pressure is 3.0×105 Pa. At this condition, atomized particles of 200—500 μm and primary Si particles of 3—7 μm were got. When the gas pressure is in the range of 2.0×105—4.0×105 Pa, the total pressure and velocity of the “stagnation” decrease, and the total pressure and velocity of the intersection and the cooling velocity increase with the gas pressure increasing.
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