电场极性对池沸腾换热影响的机理  

Mechanism of Influence of Polarities on Pool Boiling Heat Transfer in Electric Field

作　　者：董智广[1] 黄烜[2] 程道来[1] 李瑞阳[2] 

机构地区：[1]上海应用技术学院城市建设与安全工程学院,上海201418 [2]上海理工大学能源与动力工程学院,上海200093

出　　处：《上海应用技术学院学报（自然科学版）》2012年第2期94-96,共3页Journal of Shanghai Institute of Technology: Natural Science

基　　金：上海应用技术学院引进人才科研启动项目(YJ2011-16);上海市重点课程建设项目(1020 M10100);热能与动力工程学科建设项目(1020Q110011)

摘　　要：对电场极性影响池沸腾换热的机理进行了理论分析和实验研究。在实验中,换热面为一平板并接地作为0电极,高压电极为平行于换热面的线状电极。实验结果表明,正电压下的强化换热效果优于负电压下的强化换热效果。这是由于施加正电压时不会有阴极发射电子现象,而施加负电压会有阴极发射电子现象,阴极发射电子削弱了电场对沸腾换热的作用。The mechanism of pool boiling heat transfer influenced by different polarities of electric field was investigated theoretically and experimentally. The high voltage electrode was straight wire electrode parallel to the heat exchanger surface while the heat transfer surface of parallel plate was earthed as 0 electrode in this experiment. Experimental results show that positive voltage brings better enhance- ment effects of heat transfer than negative voltage, because under positive voltage there is no charge injection phenomenon which occurs under negative voltage, and the charge injection from cathode can weaken boiling heat transfer in an electric field.

关 键 词：电水动力学 沸腾换热 强化传热 极性 

分 类 号：TK124[动力工程及工程热物理—工程热物理]