Date of Award
Master of Science
Mechanical and Aerospace Engineering
Mechanical and Aeronautical Engineering
Dr. Chris Cho
Dr. Srinivas Garimella
Dr. Jerry Hamelink
Masters Thesis-Open Access
Water spray cooling characteristics of a solid heated surface were investigated to better understand the physical phenomenon of nucleate boiling heat transfer for full cone sprays. An experimental test loop was developed to conduct the spray cooling experiments. A uniform heat flux condition was assumed, and the liquid flow rate and nozzle orifice diameter were selected as the main variables. Two water temperatures were chosen to perform the study. Saturated water spray was utilized to measure the wall superheat temperature. Subcooled water spray was applied to investigate the effect of water spray in the single-phase regime.
Experiments conducted using the saturated water spray revealed the heat transfer rate as a function of Weber number and the superheat temperature. The surface temperature was related to the characteristic velocity. The subcooled water spray tests indicated that liquid flow rate and nozzle orifice diameter were insignificant in the single-phase regime. Furthermore, a correlation was developed in terms of Reynolds number and Prandtl number. Test results also indicated a better cooling effect during the evaporation of the liquid film above saturation temperature.
Ponzel, Rainer F., "Experimental Investigation of Water Spray Cooling Characteristics of a Solid Heated Surface" (1997). Master's Theses. 4854.