The Effect of Ambient Air Condition on a Hot Steel Plate Cooled by Impinging Water Jet

Abstract

It is observed that the cooling capacity of impinging water jet is affected by the seasonal conditions in steel manufacturing process with large scale. To confirm this phenomena, the cooling experiments of a hot steel plate by a laminar jet were conducted for two different initial ambient air temperature( and ) in a closed chamber, and an inverse heat conduction method is applied for the quantitative comparison. It is found that the cooling capacity under air temperature is lower than that under , as is the saturated water vapor is more easily observed, and the amount of total extracted heat in the case of is smaller by nearly 15% than that of case. From these results, it is thought that the quantity of water vapor, which could be absorbed until saturation, effects on the mechanism of boiling heat transfer.