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.

摘要： 为节约能源，防止过度曝气，对5台不同功率的双叶轮液下自引气曝气机进行实验，测试出每台曝气机不同转速时的充气速度和其中3台曝气机不同转速时的溶解氧浓度；根据实验数据，利用数理统计中的线性回归分析方法，分析得出充气速度与转速、转速与氧利用率之间的关系；进一步推导出转速与充氧速度之间的关系，并与实验数据进行对比分析。结果表明：虽然氧利用率与转速关系的数学模型与实验所得值的变化趋势有所偏差，但求得充氧速度的计算值在满足800≤n≤1450时，计算后发现计算值与实验测得的值最大相对误差 δmax＜0.082，认为所推导的转速与充氧速度之间的关系式可以比较准确的反应出转速与充氧速度的关系，在实际工程中，可以作为对曝气机运行控制的理论基础和依据。

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