Machinery & Energetics

Injecting the drying agent contributes to a significant increase in the intensity of the drying process, but at the same time the power required for pumping of the coolant is increasing too. The purpose of this study is to determine the geometric parameters of the jet system, which would provide the highest intensity of heat transfer with minimum hydraulic losses. The calculations were carried out using a channel model of transport processes with the flow around a surface by a system of jets [2], which was adapted to the case of jet flow around a moving surface [3]. As a result of the study, the optimal parameters of the jet system were established: 520 holes with a diameter d_o = 0,015 m, located in 5 rows with a uniform step S₁ = 0.035 m. This configuration of the jet system will provide an increase in the heat transfer coefficients by 40% with a hydraulic resistance increase of no more than 20 %

heat-mass exchange, hydraulic resistance, jet blown, nozzle plate