考虑设计裕度的 Smith 图扩展应用探索研究

In this paper, a one-dimensional design program is written, and the E parameter is introduced as the margin evaluation parameter to complete the calculation of the design point characteristics of the one-dimensional design scheme in the range of subsonic compressible non-repetitive stages, and the Smith diagram with an extension in the margin level is obtained. Combined with Smith’s diagram, the influence of each one-dimensional design parameter on the margin is analyzed. The program and Smith diagram are applied to a nine-stage compressor, the reliability and the rationality of E parameter as margin parameter are verified, and the selection of the nine-stage E parameter is preliminarily explored.