针对传统经验叶栅损失及落后角模型缺少厚度分布修正项的问题，基于多元非线性回归分析方法对叶栅损失及落后角模型进行修正，采用修正模型分析了最大厚度位置系数影响下叶栅攻角损失特性、落后角与攻角特性曲线的变化情况。修正后的模型与CFD计算值拟合效果较好，叶型损失均方差从0.028降低至0.007，落后角均方差从1.898°降低至0.860°。修正后的模型的计算精度、适用范围得到提升。

Aiming at the problem that the traditional empirical cascade loss and deviation angle model lacked the thickness distribution correction term,the cascade loss and deviation angle model was modified based on the method of multivariate nonlinear regression analysis.The article analyzed the changes of the cascade incident angle loss characteristic curve and the deviation angle and the incident angle characteristic curves under the influence of the maximum thickness position coefficient.The modified model fits well with the CFD calculated values.The mean square error of blade profile loss is decreased from 0.028 to 0.007,that of deviation angle is decreased from 1.898° to 0.860°.The calculation accuracy and application scope of the modified model are improved.

TK221

国家科技重大专项（2017-II-0006-0019）