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对10组ЦИАМ的叶型数据进行分析,比较了原始ЦИАМ损失模型所预测的和实验所得的损失数据。在此基础上,从临界速度系数、尾迹损失、马赫数、二次流损失沿叶高分布等方面对ЦИAM模型进行了修正。通过对某四级涡轮S2正问题计算结果分析可知,修正后的损失模型预测叶型损失误差相对于实验结果从37.56%下降到了22.59%,而总损失的误差从38.31%下降到了30.95%,且其S2优化所得叶片沿叶高扭曲规律与基于原始模型的优化结果有较大差别,总体上说,大部分叶栅出口气流角的根部大顶部小趋势比原型更加强烈,但个别叶栅则呈现根部和顶部大而中间小的特点。
Leaf mass data for 10 groups of ЦИАМ were analyzed, and the predicted and experimental loss data were compared for the original ЦИАМ loss model. On this basis, the ЦИAM model is modified from the critical velocity coefficient, wake loss, Mach number, secondary flow loss along the leaf height distribution. By analyzing the calculation results of the positive problem of a fourth-stage turbine S2, it can be seen that the corrected loss model predicts the leaf-type loss error decreases from 37.56% to 22.59% compared with the experimental result, while the error of the total loss decreases from 38.31% to 30.95% The results show that S2 has a larger tendency of warping along the leaf height than that based on the original model. Generally speaking, the small top trend at the root of the exit angle of most cascades is more intense than that of the prototype. However, Roots and tops are large and small in the middle.