不同工质中气泡在电场作用下的变形

Deformation of bubbles in electric field with different working fluid

研究在外加电场作用下,不同介电常数的工质对强化沸腾换热的影响,分析了苯、R11、乙醚和乙酸乙酯4种工质在池沸腾换热中,气泡附着于壁面时的电场分布特性及气泡所受的电应力.结果表明:随着工质介电常数的增加,气泡表面场强分布的不均匀性增加,其所受电应力分布愈不均匀,导致气泡形变量加剧,甚至造成破裂.

Based on the characteristics of electric field around a bubble and forces on a bubble, the boiling heat transfer enhancement in a uniform electric field using the working fluids benzene, Rll, ethyl ether and ethyl acetate were studied theoretically. The results indicate that the surface strength distribution of bubbles becomes much more uneven as the working fluid dielectric constant increases and it will bring on the variables with respect to bubble shape increased even cause the bubbles rupture.