Aerodynamic Optimization Design of a Multistage Centrifugal Steam Turbine and Its Off-Design Performance Analysis

Table 2

The main aerodynamic parameters of each stage.

Stage number	1st	2nd	3rd
Speed ratio	0.69	0.86	0.87
Reaction degree	0.322	0.453	0.468
Flow coefficient	0.97	0.97	0.97
Flow coefficient	0.95	0.95	0.95
Mach number of stator	0.55	0.58	0.76
Shaft power (kW)	1205	1551	2436
Wheel efficiency	91.20%	90.97%	90.98%