Abstract
A V type slot nozzle in an impact type quick freezer was selected as the research object, the influence of nozzle structure parameters on nozzle outlet velocity was studied with CFD software. The results showed that the optimal height range of the V type diversion trench was 70-74mm. When the angle of V type diversion trench was 15 °, the nozzle outlet velocity reached the maximum value. As the angle increased, the outlet velocity of the nozzle increased obviously and then decreased slowly. With the increasing of nozzle width, the outlet velocity of nozzle was obviously different, and it showed the overall upward trend. The nozzle exit height had little influence on the nozzle outlet velocity, when nozzle exit height changed from 0mm to 40mm, the nozzle outlet velocity was between 13.00-14.50m/s. This study provided a theoretical basis for optimal design of impact freezer nozzle structures.
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