Multipoint and Multiobjective Optimization of a Centrifugal Compressor Impeller Based on Genetic Algorithm

Table 3

Active variable numbers, range of variations, and constraints in initial design space.

	Active variable number	Range of variation
Hub	7, 8, 9, 10, 11
	20, 21, 22, 23, 24
Shroud	29, 30, 31, 32, 33, 34
	37, 38, 39, 40
Full root	44, 45, 46, 47, 48, 49, 50
Full tip	51, 52, 53, 54, 55, 56, 57, 58
Splitter root	59, 60, 61, 62, 63
Splitter tip	64, 65, 66, 67, 68

Constraints. Inactive variables are unchanged in the optimization. Diffuser inclination against radial equals 13 deg. Shaft speed is 50000 rpm.