Table 3 shows the normalized tip displacement of radial and axial directions. The radial and axial
displacement of the blade type A is 0.0067 and −0.0052, respectively. In the case of blade type B, the radial and axial displacement is 0.0033 and −0.0025.
Fig. 8 presents the stress distribution of the impellers under combination loads. The maximum stress occurs at the blade hub for both blade type A and B.