H111 ブタノール水溶液の限界熱流束に及ぼす沸騰気泡の影響(OS-11:沸騰・二相流(1))

概要

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It is known that some alcohol such as butanol shows peculiar temperature dependence of surface tension. Thus, thermo-capillary force acts for the liquid to wet the heated surface, so that solutions are sometimes called as "Self-rewetting Liquids". In this paper, a boiling experiment of butanol aqueous solution was performed on a wire. A heated wire is easy to observe the phenomena and easy to address the fundamental issues of boiling. Bubbling aspects and bulk liquids component were measured utilizing high-speed video camera and microscope lens Critical Heat Flux of Butanol aqueous solution at saturated temperature is enhanced from 2 to 3.5 times higher than that of pure water. Two types of boiling aspects were observed in this paper. Boiling mode of butanol aqueous solution is named as "Small bubble Emission Boiling (SEB). SEB is very high heat flux and bubble is small size, and many in number Bubbles are hard to coalescence.
一般社団法人日本機械学会の論文
2011-10-28