4. Case study: Design of the centrifugal compressor

The case study presented in the literature [5] is considered for the present illustration for the design and numerical analysis of the centrifugal compressor. Main objective of the current work is to design a centrifugal compressor capable of delivering a pressure ratio of 5.4 with a mass flow ingestion rate of 5.73 kg/sec. The compressor is targeted to achieve 82% total-total efficiency with design constraints of 280 mm for the impeller and 340 mm for the diffuser in terms of diameter. Also, the compressor has to generate flow parameters relative to functional downstream components.

### 4.1. Centrifugal compressor specifications

The input parameters of the centrifugal compressor are tabulated in Table 1.


Table 1. Geometrical and functional specifications of analysed turbo-machinery.

Preliminary design of the impeller and vaned diffuser is carried out by adapting a onedimensional model approach. Comprehensive design of the centrifugal compressor stage was generated using ANSYS BladeGen module.
