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利用EHD技术对工质R123进行了非均匀高压电场下电场极性对池沸腾换热影响的实验研究。结果表明:无论施加正、负电压,强化系数均随热流密度的增加而下降,最终达到稳定值;高热流密度下,正电压有较弱的强化效果,负电压对沸腾换热具有削弱作用;正电压下的强化换热效果优于负电压下的强化换热效果.
Experimental study on the influence of electric field polarity on pool boiling heat transfer under nonhomogeneous high voltage electric field of R123 by using EHD technique. The results show that both the positive and negative voltages decrease with the increase of heat flux density, and finally reach the steady value. Under the condition of high heat flux density, the positive voltage has weaker strengthening effect, negative voltage has a weakening effect on boiling heat transfer. The enhanced heat transfer under positive voltage is better than the enhanced heat transfer under negative voltage.