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将求解多级轴流压气机特性的S2正问题计算程序集成在ISIGHT优化软件上,构建压气机S2正问题气动性能优化平台.针对某4级轴流压气机,通过调整沿径向截面的叶栅弯角、叶栅稠度、叶型最大相对厚度等参数,考核设计几何参数对S2正问题计算效率目标函数的影响程度,择优选取设计参数作为优化变量,建立响应面模型,结合遗传算法,对目标函数进行优化.结果显示压气机特性整体提高,设计点压比增加19.6%,效率提高4.66%,折合转速1.0下的稳定裕度增大到22.32%,验证了构建优化平台在压气机气动设计中的实用价值,可供内流叶轮机气动性能优化设计参考.
The S2 positive problem calculation program to solve the multi-stage axial flow compressor characteristics is integrated into the ISIGHT optimization software to build a positive aerodynamic performance optimization platform for the S2 compressor.For a 4-stage axial compressor, Grid corner angle, grid curvature, the maximum relative thickness of the blade, and other parameters. The influence of design geometric parameters on the objective function of the S2 positive problem is evaluated. The design parameters are selected as optimization variables, and the response surface model is established. The results show that the performance of the compressor is improved as a whole, the design pressure ratio increases by 19.6%, the efficiency increases by 4.66%, and the stability margin at the equivalent speed of 1.0 increases to 22.32% In the practical value for the internal flow impeller aerodynamic performance optimization design reference.