Based on the experimental design,three-dimensional numerical simulation,adaptive genetic algorithm and neural network response model,an optimization design platform is developed to investigate the flow path design of the compressor intermediate duct.According to optimization results,the internal flow performance of duct is analyzed.The research results indicate that the total pressure loss can be reduced by adopting the duct area distribution law of first expansion and then contraction,in which the area is the largest near the maximum thickness of the strut.The hub curvature distribution has an important effect on the total pressure loss.The pressure distribution can be controlled by optimizing the curvature of hub and the flow separation at the trailing edge of the strut can be alleviated.Compared with the prototype,the total pressure loss is reduced by 27.7%through the optimization of duct hub and shroud.
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