Comparative Study on Steady and Unsteady Flow in a Centrifugal Compressor Stage

Table 1

Specifications of the centrifugal compressor stage.

Parameter	Value
Relative tip clearance, CR	2.3%
Rotating speed,	12500 rpm
Design flow coefficient,	0.083
Design pressure ratio,	2.1
Impeller
Number of blades,	11
Backsweep angle,	47 deg
Inlet tip radius	70 mm
Exit tip radius	130 mm
Vaned diffuser
Number of vanes,	10
Inlet radius	145 mm
Exit radius	165 mm