C_2Cl_3F_3およびC_8F_<16>Oの平等電界下における沸騰熱伝達と絶縁破壊

概要

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The effect of a uniform, alternating current voltage on boiling heat transfer and an electric breakdown under boiling conditions was studied for dielectric liquids C_2Cl_3F_3 and C_8F_<16>O, using horizontal and parallel electrodes (the earthed electrode was used as a heating surface) with a small gap. An increase in electrical field intensity increased the nucleation site density and decreased the bubble diameter at departure. In particular, the boiling heat transfer coefficient of the C_2Cl_3F_3 had a maximum valve above 5.0 kV/mm at a gap length of 3.0 mm in terms of the pumping action of the electric field. The electric breakdown voltage decreased remarkably when the bubble was produced from the heating surface, but it did not depend on the heat flux ; and also, it was found to have a similar tendency to Paschen's Law.
一般社団法人日本機械学会の論文
1986-04-25