EHD强化相变换热同轴圆柱特征电极的理论分析

Theoretical analysis of coaxial cylindrical featured electrodes for EHD enhancement of phase-change heat transfer

针对施加直流高压电场的电水动力学(EHD)强化管外沸腾换热和EHD强化管内凝结换热两种换热方式,提出了3个同轴圆柱特征电极参数,分别与最小场强电极、最小电场力电极、最小能耗电极对应.分析了3个电极参数的几何特性,结果表明,电极直径的大小,在EHD强化相变换热中起重要作用.

Based on electrohydrodynamics （EHD） enhancement of boiling heat transfer outside a tube and condensation heat transfer inside a tube in high voltage DC electric field, three coaxial cylindrical featured electrodes were presented. These three featured electrodes had minimum electric field strength, minimum electric field force and minimum work consumption, respectively, and the latter two electrodes were derived by the authors for the first time. The geometric characteristics of the electrodes were analyzed and the results showed that the diameter of the electrode played an important role in EHD enhancement of phase-change heat transfer.