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以R-123为工质,对圆柱形电极和三角形电极进行了电水动力学(EHD)强化管内核沸腾换热试验研究。试验换热管为垂直套管式,外层为加热水路,内层为工质回路,中心布置着电极。电场强度范围为0～2.133MV/m,热流密度范围为1.5～10.0kW/m2,换热系数的误差为±9.7%;相应的强化因数的误差为±12.2%。结果表明:两种电极的最大强化因数接近,分别为2.15和2.11;在达到最大强化因数时,三角形电极所需要施加的平均电场强度和能耗比圆柱电极低得多。
Using R-123 as the working fluid, the EHD-enhanced inner-tube boiling heat transfer test was carried out on cylindrical and triangular electrodes. Test tube for the vertical tube heat transfer, the outer layer of heated water, the inner layer of the working fluid circuit, the center of the layout of the electrode. The electric field strength range is 0 ~ 2.133MV / m, heat flux density range is 1.5 ~ 10.0kW / m2, the error of heat transfer coefficient is ± 9.7%; the corresponding error of enhancement factor is ± 12.2%. The results show that the maximum enhancement factor of the two electrodes are close to 2.15 and 2.11, respectively. When the maximum enhancement factor is reached, the average electric field strength and energy consumption of the triangular electrodes are much lower than those of the cylindrical electrodes.