电极极性影响EHD强化沸腾传热的机理
MECHANISM STUDY OF EFFECTS OF ELECTRODE POLARITIES ON EHD ENHANCEMENT OF BOILING HEAT TRANSFER作者机构:山东理工大学交通与车辆工程学院山东淄博255012 上海理工大学动力工程学院上海200093
出 版 物:《化工学报》 (CIESC Journal)
年 卷 期:2004年第55卷第1期
页 面:160-162页
核心收录:
学科分类:080701[工学-工程热物理] 08[工学] 0807[工学-动力工程及工程热物理]
基 金:国家重点基础研究发展规划项目 (No G2 0 0 0 0 2 63 0 2 )~~
摘 要:The effects of electrode polarities on EHD enhancement boiling heat transfer were investigated theoretically and experimentally based on the analysis of electric field distribution affected by superheat boundary layer and charge injection. The results showed that electric field distribution was changed by the charge induced by temperature gradients in the superheat boundary layer, but the change was independent of electrode polarities. However, when electric charge injection occurred, the electrode applied positive high voltage might generate different characteristics of charge injection from that generated by applied negative high voltage. If the electric field on the surface of heat transfer increased due to charge injection, the augmentation effects would increase. The experiments demonstrated that positive high voltage gave larger enhancement factors than negative high voltage. The experimental phenomena could be interpreted well on the basis of charge injection characteristics.