Heat Transfer Characteristics of Multinozzle Air Impingement Jet during Die Steel Plate Cooling Progress

Aiming at the new die steel quenching equipment, using Fluent software, the effects of the nozzle spacing, height, injection pressure, and comprehensive factors on the heat transfer characteristics are studied. The results show that when the nozzle spacing and injection pressure are given, the heat transfer coefficient increases first and then decreases with the injection height increase, and the cooling uniformity is better; when the injection pressure is given, the injection height increases with the nozzle spacing increase under the maximum heat exchanger capability; when the nozzle spacing is given, the injection height increases with the injection pressure under the maximum heat exchanger capability; for the nozzle arrangement in the paper, there is a relationship between the injection height and nozzle spacing when the heat transfer is uniform, H approximate to 8S. The results have important reference value for optimization design of the equipment and actual production process.