Optimal Design of a Centrifugal Compressor Impeller Using Evolutionary Algorithms

Table 2

Control points for the blade angle and design variables.

At the tip			At the hub
Points	𝜆	𝛽 [angle]	Points	𝜆	𝛽 [angle]
Pt1	0.0	−61.845	Pb1	0.0	−36.399
Pt2	0.167	−59.627	Pb2	0.143	−27.859
Pt3	0.335	−30.022 (𝜙5)	Pb3	0.286	−39.754 (𝜙7)
Pt4	0.499	−84.158	Pb4	0.429	36.429
Pt5	0.661	46.949 (𝜙6)	Pb5	0.527	−82.025
Pt6	0.833	−41.912	Pb6	0.714	80.409 (𝜙8)
Pt7	1.0	−30.853	Pb7	0.857	−26.313
	—	—	Pb8	1.0	−30.514