Nucleation and Critical Heat Flux in Spray Cooling

点击翻译按钮获取中文摘要

. 9616344 Chow, Louis C. ABSTRACT This proposal deals with spray cooling for high heat flux applications. The principal investigators propose to experimentally determine the relative importance of forced convection, nucleate boiling from surface cavities, and secondary nucleate boiling due to air/vapor nuclei entrapped by the impinging droplets. A high-speed camera will be used in conjunction with a semi-transparent synthetic-diamond film to visualize the boiling process. Relevant parameters such as the bubble density, growth rate, etc. will be determined for calculating the contribution of nucleate boiling in spray cooling. The contribution of secondary nucleate boiling will be established by comparing the nucleation characteristics with that conducted with a submerged jet where secondary nucleation is absent.