每年出版 8 期
ISSN 打印: 1065-5131
ISSN 在线: 1563-5074
Indexed in
Nucleate Boiling Heat Flux Enhancement on Macro/Micro-Structured Surfaces Cooled by an Impinging Jet
摘要
An experimental investigation of nucleate boiling heat transfer from a surface cooled by a circular jet impinging normally to the surface is reported. To enhance the nucleate boiling and maximum heat fluxes, macro and micro modifications were made to the boiling surface. Macro-modification consists of forming radial grooves on the surface while micro-modification is achieved by sintering the surface. With macro/micro-modification, the boiling curve is shifted to the left and upwards. At least two fold enhancement in nucleate boiling heat fluxes and CHF is observed over that for a plane surface. In the experiments water and Freon-113 were used as test fluids. The data also delineate the effect of oxidation of the heated surface on nucleate boiling curve.
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