Loss Mechanism of Static Interstage Components of Multistage Centrifugal Compressors for Integrated Blade Design

Table 1

Geometric parameters and operating conditions of the original model.

Parameter	Value
Number of impeller blades, Z1	13
Speed, N (rpm)	8129
Average impeller inlet diameter, D1 (mm)	326.54
Impeller outlet diameter, D2/outlet width, b2 (mm)	600/39
Number of diffuser blades, Z2	0
Diffuser inlet diameter, D3/inlet width, b3 (mm)	660/39
Diffuser outlet diameter, D4/outlet width, b4 (mm)	960/39
Bend inner arc radius, R1/outer arc radius, R2 (mm)	18/57
Number of return vanes, Z3	10
Return inlet diameter, D5/inlet width, b5 (mm)	946/32
Average return outlet diameter, D6/outlet width, b6 (mm)	466/52.63
Medium	Air
Design condition mass flow, Q, (kg/s)	7.6
Efficiency, η	76.97%
Pressure ratio, ε	1.432