Abstract
Unsteady boiling heat transfer characteristics while water spray cooling were experimentally measured, focusing on effects of surface oxide film on steel plate, in order to obtain fundamental information for improving TMCP in steel production process. Oxide film thickness and its characteristics were measured before and after spray cooling, by laser microscope. Oxide file thickness ranged between 0 to 50 μm. It was found that heat transfer characteristics in film boiling region and MHF conditions were affected by oxide film thickness, liquid subcooling and liquid flow rate density.
