本文以高粘性流体为实验工质，对水平光滑管内油的层流流动换热进行了直流高压电场强化(EHD效应)实验研究。以实验方法调查了其换热系数强化率与外加电场强度、热流密度及流动速度,油温等因素的相关性。实验证实了外加直流高压电场能对管内层流强制对流换热起着很好的强化作用。验证了高粘性流体在EHD效应下,综合换热性能同样有大幅度增加
An experiment was performed for the laminar flow forced convective heat transferof oil through horizontal uniform heated tube under direct current highvoltage radial Electric Field. The effects of electric voltage applied, heatflux, flow velocity and temperatures of oil on the enhanced heat transfer werefully investigated. The experimental results show that: for low electricvoltage applied (U<1.5 kV), the heat transfer enhancement ratio was low andalmost not influenced by the heat flux. With increase of voltage applied, theheat transfer enhancement ratio increased rapidly. For high electric voltageapplied, with increase of heat flux the heat transfer enhancement ratiodecreased. In the experiment, the maximum heat transfer enhancement ratio was morethan 9 times under 4.0 kV voltage applied
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