Figures & data
Figure 1. Optimization procedure.
Table 1. Features of impeller.
Table 2. Meshing and boundary conditions.
Figure 2. Geometry showing impeller, rotor and diffuser.
Figure 3. Mesh in flow domain for impeller, rotor and diffuser.
Table 3. Design variables with design space.
Figure 4. Case I PoF and cluster points for (a) different surrogates and (b) selected cluster points.
Table 4. PRESS for weights calculation.
Table 5. Surrogate-produced errors.
Figure 5. Case I design variables trend for WAS-WAS PoF (a) efficiency and (b) head.
Table 6. Surrogate-produced errors for Case I.
Figure 6. Case I pressure contours on pressure and suction side.
Figure 7. Case II PoF and cluster points for (a) different surrogates and (b) selected cluster points.
Figure 8. Case II design variables trend for WAS-WAS PoF (a) efficiency and (b) head.
Table 7. Surrogate-produced errors for Case II.
Figure 9. Case II pressure distribution.
