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压气机转子和透平转子承受的是离心力和热负载。这类负载与其叶尖速度、压比和气体温度成正比。另一方面,为了改善转子的动力学特性和限制轴承负载,还要减少转子的重量。这样,需要有一种最佳设计方法,使所设计的叶轮在应力极限范围内重量最轻。本文介绍了一种透平机械转子的最佳设计方法,并讨论几种应用结果。最佳化程序使用了顺序线性规划法,同时用Donath法进行变厚度叶轮离心力和热应力分析。通过在等强度叶轮上的应用以及与分析结果的比较,证明这个方法是正确的。最后,用这种最佳设计程序设计轴流式压气机叶轮。
Compressor rotors and turbine rotors are subject to centrifugal and thermal loads. This type of load is proportional to the tip speed, pressure ratio and gas temperature. On the other hand, in order to improve the dynamic characteristics of the rotor and limit the bearing load, but also reduce the weight of the rotor. In this way, there is a need for an optimal design method that allows the design of the impeller to be the lightest weight within the stress limit. This article presents the best design method for a turbomachine rotor and discusses several application results. The optimization procedure used the sequential linear programming method, while the Donath method was used for the variable thickness impeller centrifugal force and thermal stress analysis. This method is proved to be correct through the application on the equal strength impeller and comparison with the analysis results. Finally, use this best design procedure to design an axial compressor wheel.