In this work, two different blade positioning in the meridional plane have been selected for the detailed design
and optimization of the impeller blades. From the design, first of all the annulus geometrical dimensions have been
calculated. To calculate the span-wise variation of the blade angles, the blade span was divided into ten equal
sections parallel to hub and casing. The span-wise variation of mean blade angle (βm) for inlet inclined and
trapezoidal blade positioning in the meridional annulus is shown in Fig.2. Fig.3 shows the span-wise variation of
blade aspect ratio (S/C) for inlet inclined and trapezoidal blade positioning in the meridional annulus.