以质量分数为 0 .16 %的KCl溶液为示踪剂 ,采用扰动 -应答技术测取模型参数 ,并以传递函数法和富里哀分析法拟合 ,当s取值在 1.0～ 1.5、ω取值在 0 .0 2～ 0 .10时 ,求出了不同柱高、柱径和流速下的返混系数 .结果表明 ,不同柱高、柱径和流速下由两种方法计算得到的轴向返混系数数值相当 ,这也验证了此二法的准确性 . Using KCl solution with mass fraction of 0.16% as tracer, the parameters of the model were measured with a perturbation-response technique and fitted with the transfer function method and Fuli analysis method. When s was between 1.0 and 1.5, ω was taken The values ​​of backmixing coefficient at different column height, column diameter and flow rate were obtained when the value was from 0 .0 2 to 0. 10. The results showed that the axial misorientation calculated by the two methods with different column height, column diameter and flow rate Backmixed coefficient values ​​are equivalent, which also verifies the accuracy of the two methods.