Abstract: The electric field enhancement of natural convection and pool boiling heat transfer of ethyl acetate on plate surface was investigated. The comparison and analysis for the experimental results were performed. The experimental data indicated that electric field has a strong enhancement effect for natural convection and pool boiling heat transfer of ethyl acetate. The enhancement effect of electric field for ethyl acetate natural convection heat transfer is larger than the effect for pool boiling heat transfer. At the same voltage, the enhancement factor，f，decreases gradually with further increasing heat fluxes. When the heat flux is larger than 4kW•m^-2, the variations in enhancement effect of electric field for natural convection heat transfer are much less with further increasing of heat flux.At the same heat flux, the enhancement factor increases gradually with increasing voltage of the applied electric field. Since ethyl acetate is a strong polar organic dielectric, it has intense response to the electric field applied. In the experimental condition, the enhancement factor of electric field for natural convection heat transfer reaches 6—7. For pool boiling heat transfer, the enhancement factor reaches 4—5.

Key words: 电场, 强化传热, 乙酸乙酯, 自然对流换热, 沸腾换热

摘要： 对沉浸于强极性有机液体工质乙酸乙酯中的平板表面上的自然对流和沸腾换热的外加电场强化进行了实验，得出了自然对流和沸腾换热的表面传热系数、强化效果与电场电压、热通量的关系.实验数据表明，外加电场对平板表面自然对流换热的强化效果好于对沸腾换热的强化效果.实验条件下，当施加外电场时，平板表面的自然对流换热的传热系数最大可达到无外电场时的6～7倍，沸腾换热的传热系数最大可达到无外电场时的4～5倍.

关键词: 电场, 强化传热, 乙酸乙酯, 自然对流换热, 沸腾换热