Abstract The aerodynamic design of a single-stage small flow rate centrifugal compressor is completed by theoretical analysis and CFD simulation, the simulation results can meet target performance. In addition, an equal proportion prototype performance test bench was designed built, using air as working medium completed. show that overall trend measured flow-pressure ratio curve fits well with ...

The paper presents the research of flow instabilities in inlet part a centrifugal compressor channel equipped with radial guide vanes. A simplified model is created and for that, dimensional analysis carried out. Methods computational fluid dynamics (CFO) are employed parametric study, which gives basic information about influence dimensionless parameters to field. Reconstruction comprehensive ...

Stable operation of axial and centrifugal compressors is limited towards low mass 1ows due to the occurrence of surge. The stable operating region can be enlarged by active control. In this study, we use a control valve which is fully closed in the desired operating point and only opens to stabilize the system around this point. As a result, only nonnegative control values are allowed, which co...

A novel aproach to active surge control is presented. A centrifugal compressor driven by an electrical motor is studied, and the drive itself is used for surge control, thus elliminating the need for additional actuators. It is shown that by using the rotational speed of the motor as control, previous unstable operating points to the left of the surge line can be made globally exponentially sta...