| Title |
Measurements of Heat Transfer Distribution in Spray Cooling of Hot Steel Plate |
| Keywords |
Spray cooling ; 분무냉각 ; Boiling ; 비등 ; Heat treatment ; 열처리 ; Droplet flow rate ; 액적유량 ; Heat transfer ; 열전달 |
| Abstract |
A good understanding of the heat transfer distribution is very important to suppress the deformation of steel products. In this study, the local heat transfer coefficients are experimentally investigated to understand the heat transfer distribution of thick steel plates with even flat spray nozzle. The steel slabs are cooled down from the initial temperature of about 1000℃, and the local heat transfer coefficients and surface temperatures are calculated from the measured temperature-time history. The results show that the local heat transfer coefficients of spray cooling are dominated by the local droplet flow rate, and in proportion to becoming more distant from the center of heat transfer surface, the local heat transfer coefficients decrease with the decrease of the local droplet flow rate. |