Experimental study on spray cooling for high-power laser

Using water as coolant, TG0.3 full-cone nozzles supplied by Spraying Systems Co. are applied to study heat transfer performance of micro-channel surface in non-boiling regime of spray cooling when volumetric flux ranges from 0.044 m3/(m2·s to 0.053 m3/(m2·s. The results indicate that heat transfer is obviously enhanced for micro-channel surfaces relative to the flat surface. It is found that when the wall temperature is 52 ℃ and the volumetric flux is 0.044 m3/(m2·s, the heat flux dissipated on micro-channel surface, whose fin height is 0.2 mm, could reach 260 W/cm2; when the volumetric flux increases to 0.053 m3/(m2·s, the heat flux could reach 376 W/cm2 at the same surface temperature. For the sm