Heat Transfer Characteristic of Slit Nozzle Impingement on High-temperature Plate Surface

Abstract

Controlled cooling is widely applied in steel plate/strip production. It helps to improve the microstructure and mechanical properties of a rolled steel sheet. As shown in Fig. 1, an ultrafast cooling (UFC) system on a run-out table in a factory uses jet impinging technology with high heat efficiency.1,2) Heat transfer characteristics are mainly affected by the jet parameters, fluid properties, steel plate properties, environmental factors, etc. and they strongly affect cooling ability and uniformity. These parameters also define model accuracy, thus, their thorough understanding is crucial for the cooling system optimization. Numerous studies have been reported on round jet impingement heat transfer characteristics and what affects Heat Transfer Characteristic of Slit Nozzle Impingement on Hightemperature Plate Surface