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Table 1 Main dimensions and grid structure of centrifugal compressor components

From: CFD investigation of flow through a centrifugal compressor diffuser with splitter blades

Impeller

 Impeller inlet diameter, mm

92 (hub)

139 (shroud)

 Impeller exit diameter, mm

182

 Impeller exit blade height, mm

10

 Impeller leading edge axial lean angle, degree

− 29

 Impeller trailing edge axial lean angle, degree

− 2

 Impeller speed, rpm

43,500

 Number of blades

36 ( radial)

 Blade spanwise–backswept from radial, degree

32–42

 Nodes

372,260

 Elements

348,398

Diffuser-1

 Inlet diameter of diffuser-1, mm

190

 Exit diameter of diffuser-1, mm

250

 Main vane: height – length, mm

10–46

 Main vane thickness, mm

1

 Main vane angle, degree

65°

 Splitter vanes: height – length, mm

10–32

 Splitter vane thickness, mm

1

 Splitter vanes angle, degree

59°

 Number of vane/splitter pairs

30 (straight)

 Nodes

372,890

 Elements

349,792

Diffuser-2

 Inlet diameter of diffuser-2, mm

251

 Exit diameter of diffuser-2, mm

410

 Number of vanes

30 (curved)

 Leading edge: height – thickness, mm

11.4–5.2

 Trailing edge: height – thickness, mm

20–6.1

 Chord of vanes, mm

80

 Nodes

344,260

 Elements

323,544