Abstract
Experiments were performed with FC-72 (only for flow characteristics) and DI water to investigate heat transfer characteristics from enhanced surfaces through spray cooling. Three different enhanced microstructured surfaces of 50μm SiC, 10μm CNT and 50μm diamond thin films were examined. Three full-cone spray nozzles were used with low mass flow rates of 2.92×10−4kg/s to 17.85×10−4kg/s. Three different nozzle-to-surface distances of 20mm, 35mm and 50mm were tested. Both heat transfer data and spray flow characteristics visualization via a high-speed photographic image of droplet evolution impinging the heated surface were presented and discussed. Results indicate that significant cooling performance enhancement can be reached at about 610W/cm2 with a 50μm thin diamond film for the cases under study.
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