2015 Volume 23 Issue 1 Pages 23-30
In this study，a new experimental apparatus was developed to investigate the effect of surface orientation on heat transfer characteristics of spray cooling. The distributions of heat transfer characteristics were investigated varying the volumetric droplet flow rate with the horizontal upward facing surface，the vertical surface and the horizontal downward facing surface. Experimental results showed that the surface orientation affected the heat transfer characteristics of spray cooling according to the behavior of the liquid film. In the case of the vertical surface the heat transfer characteristics in the transition region increases in the downside of spray and decreases in the upside of the spray. In the case of the horizontal downward facing surface the heat transfer characteristics in the transition region decreases near end of the region of the first liquid film.
