离心叶轮优化设计方法及参数敏感性分析

The optimization of centrifugal compressors steps into data-driven pattern with the introduction of the surrogate model, while the optimization is still based on the quasi-three design method. However, the input parameters completely rely on experience of designer. It is necessary for centrifugal impeller design to establish data-driven optimized design method. Based on the quasi-three design method, adopted all-over-controlled vortex method and combined k-fold cross validation method, the swirl distribution provided by the designer is optimized in full operation range. The numerical results indicate that the efficiency at design condition increases by 0.61%. Finally, the parameters sensitivity is analyzed by Sobol global sensitivity analysis method. The results show that the efficiency at design condition is more sensitive to the leading edge loading, while the trailing edge loading has more effects on the stall margin. This research is driven by data, and has a certain reference value to the design of a large flow coefficient centrifugal compressor.