气液两相流中气泡周围电场特性研究

针对均匀电场作用下的气液两相系统建立了数学模型，研究了单个及多个气泡附着于壁面、即将脱离和上升至两极板间的电场分布情况．结果表明，气泡周围电场的强弱及其分布的均匀性是影响气泡运动的重要因素．当大量气泡出现并有部分气泡脱离壁面时，电场对气泡的作用减弱，这为高热流密度下电场强化沸腾换热效果不再明显提供了理论依据。

Study on electric field characteristic around bubbles in two-phase flow

In order to investigate the effects of the electric field on bubbles,a mathematical model is established to predict the electric field distribution in a gas-liquid two-phase system under the action of a uniform field.The model can account for the presence of a single bubble and multiple bubbles being attached to one plate,departing from the plate, and floating into the space of parallel plates.The results indicate that the electric field intensity and its uniformity around bubbles play an important role in the movement of bubbles.When a number of bubbles generate and some of them depart into the main fluid,the effects of the electric field decrease.The study lays a theoretical foundation for diminishing EHD effects as the boiling heat flux produces greater number of bubbles.