Study on mist cooling for a superheated surface. Effect of grooved surface on heat transfer

In order to pursue the enhancement and control of mist cooling heat transfer by the grooved surface, detailed experiments have been conducted with regard to the boiling and evaporation of liquid film formed on the circular superheated surface with the concentric and/or radial groove. The experimental results indicate that the concentric grooved surface is more effective in the enhancement and stability of mist cooling heat transfer, and a optimum spray condition is given as a relation between spray mass flow rate and superheat degree. (author)