インピンジメントフリーザ内ノズルの流体力学的特性に関する研究

抄録

Food Techno Engineering Ltd. sells an impingement freezer using CO2 refrigerant for frozen foods. Although we aim to enhance the refrigeration efficiency of the freezer, the behavior of the jet flow from the nozzle is hardly understood. Therefore, we analyzed the flow in the nozzle by the simulation. The model was composed of the plenum chamber and several nozzles. As a result, there was little vertical flow in the vicinity of a plenum room, and the jet flow in the vicinity of a plenum room swung periodically. Therefore, we tried to generate the vertical flow near the plenum room by installing a distributor to the nozzle inlet in the plenum room. Consequently, the fluctuation of the jet flow was eliminated, and the jet flow was able to be uniformed at the flow velocity of 20m/s.