非均匀高压电场强化R11池沸腾传热实验研究

ELECTROHYDRODYNAMICS ENHANCEMENT OF BOILING HEAT TRANSFER WITH Rll UNDER NON-UNIFORM ELECTRIC FIELD ON PLATE SURFACE

利用EHD技术进行了工质R11的池内平板沸腾强化传热实验研究。在该实验中，换热面为-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。实验的热流密度为1～25kW／m^2，电压为0～4-25kV，得出了正、负电压下换热系数、壁面过热度、EHD强化系数和热流密度之间的变化关系，为进一步揭示EHD强化传热的机理提供了依据。

The experiment study of electrohydrodynamics(EHD) enhancement of boiling heat transfer with R11 under non-uniform electric field was presented in this paper. We used a parallel electrode with 39.0 mm gap and applied high voltage on the upper straight wire electrode while the lower heat transfer surface was earthed. In the range of heat flux 1~25 kW/m2 and voltage 0~ ±25 kV, we obtained the relationships among heat transfer coefficient, overheat temperature, EHD enhancement factor and heat flux under positive, negative, and zero voltage. It has provided a foundation for further researching of the mechanism of EHD heat transfer enhancement.