多管气泡泵液体输送性能可视化实验

Visualization of Liquid Lifting Process of Multiple Tube Bubble Pump

气泡泵提升管内气液两相流动特性直接影响工质提升性能。本文借助高速摄像仪观察了不同加热功率(400、600、800、1000、1200、1400 W)下多管气泡泵中液体提升过程,并与单管气泡泵液体提升过程进行了对比。研究结果表明:对于多管气泡泵,液体提升总量与液体提升速率随加热功率的增大而提高,与加热功率为1200 W时相比,当加热功率为1400 W时,气泡泵液体提升总量提高了15.16 kg,液体提升速率提高了5.08 g/s;多管气泡泵中心位置提升管气泡数量较多,提升效果最好。对于单管气泡泵,当加热功率为400 W时,提升管数量的增加不能提高气泡泵液体提升性能;当加热功率为600~800 W时,多管与单管的气泡泵液体提升性能相差较小;当加热功率为1000~1400 W时,多管气泡泵的液体提升总量、最大提升速率和泵效率均比单管相应性能显著提高。

The gas-liquid two-phase flow characteristics in the riser of the bubble pump directly affects its working substance lifting performance.A high-speed camera system was set-up to visualize the lifting process of multiple tube bubble pump under different heating power values(400,600,800,1000,1200,1400 W),and the liquid lifting process of the multiple tube bubble pump was compared with that of the single-tube bubble pump.The research results indicated that multiple tube bubble pumps exhibit an increase in total lifting capacity and liquid lifting rate as heating power increases.When the heating power was 1400 W,the total lifting capacity increased by 15.16 kg and liquid lifting rate increased by 5.08 g/s when compared to that under a heating power of 1200 W.The lifting effect was optimal when the number of bubbles in the lifting tube at the center of the multi-tube bubble pump was higher.With respect to single-tube bubble pumps,when the heating power was 400 W,the increase in the number of riser tubes could not improve the liquid lifting performance of the bubble pump when compared with that of multiple tube bubble pumps.When the heating power was 400 W,the increase in the number of riser tubes could not improve the liquid lifting performance of the bubble pump.Furthermore,when the heating power was 600-800 W,the single-tube bubble pump liquid lifting performance was approximately similar to that of multiple tube bubble pump.When the heating power was 1000-1400 W,the total lifting capacity,maximum lifting rate,and pump efficiency of the multiple tube bubble pump were significantly improved when compared with the corresponding performance of a single-tube bubble pump.