关键词: 双叶轮液下自引气曝气机, 充气速度, 转速, 氧利用率, 充氧速度

Abstract: We make an experiment with five double-impeller underwater aeration machines which have different powers for reducing the consumption of energy and avoiding excessive aeration, and we test the aeration speed of every aeration machine and the dissolved oxygen concentrations of three of them. when they have different rotate speed; According to the experimental data, on the mathematical statistics of linear regression analysis method, we can analyse the relationship of Aeration speed, Rotate speed, and oxygen utilization coefficient, still further conduct the relationship of Rotate speed and Oxygenate speed, compare with the experiment data.. It turned out that: although it has deviation between the mathematical model of the relationship of oxygen utilization coefficient and rotate speed and the variation tendency comes from the experiment, but from the calculation value ,when it meetings 800≤n≤1450,it can be discovered that the most relative bias between the calculation value and the value comes from experiment δmax＜0.082 through calculation. We can conclude that the relational expression between the Rotate speed conducted and Oxygenate speed could exactly response the relationship between the Rotate speed and the oxygenate speed, and it can be the theoretical basis and foundation of the control for the aeration machine.