讲气方式对气升泵中气泡行为的影响

Effect of Air Intake Modes on Air Bubble Behavior in Airlift Pump

气升泵内气泡行为是气升泵提升效率、提升能力的关键影响因素,而气升泵的进气方式对气升泵内的气泡行为有重要影响。本文通过数值模拟和实验研究的方法,研究了不同气孔类型、不同气孔间距对于气泡上升变化以及流场变化的影响.结果表明:单一气泡上升形变过程一般为圆形-蘑菇形-梭形,当气泡数量增加,气泡相互间的影响导致气泡形状变化不规则;同一进气方式生成的连续气泡,后面生成的气泡加速度大于前面气泡的加速度;增加气孔间距离,竖直方向两气泡相比水平方向两气泡容易发生融合;增加气孔数量、减小气孔间距都可以使气升泵中液体速度增加。本研究对于气升泵的结构优化和提高作业效率有着重要的意义。

Air bubble behavior in the airlift pump is a key factor affecting the efficiency and capacity of the airlift pump,and the air intake mode has an important influence on the air bubble behavior within the airlift pump.Numerical simulation methods and experimental research methods are used to analyze the effects of different types of air holes and different air hole spacing on the change of rising bubble and flow field.The results show that the rising deformation process of a single bubble is generally round-mushroom-spindle.When the number of bubbles increases,the interaction between bubbles causes the shape of the bubble to change irregularly.The acceleration of the bubble generated later is greater than the bubble generated in the front which were generated by the same air intake mode.To increase the distance between the air holes,two bubbles in the vertical direction are more prone to fusion than in the horizontal direction.Increasing the number of air holes and decreasing the spacing can increase the liquid velocity in the air lift pump.This study has important implications for the structural optimization of airlift pumps and the improvement of operating efficiency.